From 9ae0c35bd85948251f40018828b9874f5eef4fa4 Mon Sep 17 00:00:00 2001
From: Mattias-Sehlstedt <60173714+Mattias-Sehlstedt@users.noreply.github.com>
Date: Fri, 8 Aug 2025 23:07:34 +0200
Subject: [PATCH 1/4] Add endpoints with query parameters that require
 Json-serialization

---
 .../src/test/resources/3_0/echo_api.yaml      | 33 +++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
index 9a1399b5b7bc..68d0ab20668d 100644
--- a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
@@ -457,8 +457,37 @@ paths:
         explode: true #default
         schema:
           allOf:
-          - $ref: '#/components/schemas/Bird'
-          - $ref: '#/components/schemas/Category'
+            - $ref: '#/components/schemas/Bird'
+            - $ref: '#/components/schemas/Category'
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
+  /query/style_jsonSerialization/object:
+    get:
+      tags:
+        - query
+      summary: Test query parameter(s)
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+        - in: query
+          name: json_serialized_object_ref_string_query
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Pet'
+        - in: query
+          name: json_serialized_object_array_ref_string_query
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Pet'
       responses:
         '200':
           description: Successful operation

From 8b45161487c17ecc747eb2ecab9ee2e4ceff798e Mon Sep 17 00:00:00 2001
From: Mattias-Sehlstedt <60173714+Mattias-Sehlstedt@users.noreply.github.com>
Date: Sat, 9 Aug 2025 14:10:12 +0200
Subject: [PATCH 2/4] Add property for query json-serialization

---
 .../org/openapitools/codegen/CodegenParameter.java    |  9 ++++++++-
 .../java/org/openapitools/codegen/DefaultCodegen.java |  1 +
 .../org/openapitools/codegen/DefaultCodegenTest.java  | 11 +++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
index 7cd13965c470..823dc0e9ffda 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
@@ -46,6 +46,10 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
     public boolean isString, isNumeric, isInteger, isLong, isNumber, isFloat, isDouble, isDecimal, isByteArray, isBinary,
             isBoolean, isDate, isDateTime, isUuid, isUri, isEmail, isPassword, isFreeFormObject, isAnyType, isShort, isUnboundedInteger;
     public boolean isArray, isMap;
+    /**
+     * If a query parameter should be serialized as json
+     */
+    public boolean queryIsJsonMimeType;
     /**
      * datatype is the generic inner parameter of a std::optional for C++, or Optional (Java)
      */
@@ -265,6 +269,7 @@ public CodegenParameter copy() {
         output.isAnyType = this.isAnyType;
         output.isArray = this.isArray;
         output.isMap = this.isMap;
+        output.queryIsJsonMimeType = this.queryIsJsonMimeType;
         output.isOptional = this.isOptional;
         output.isExplode = this.isExplode;
         output.style = this.style;
@@ -289,7 +294,7 @@ public int hashCode() {
                 isFormStyle, isSpaceDelimited, isPipeDelimited,
                 jsonSchema, isString, isNumeric, isInteger, isLong, isNumber, isFloat, isDouble, isDecimal,
                 isByteArray, isBinary, isBoolean, isDate, isDateTime, isUuid, isUri, isEmail, isPassword,
-                isFreeFormObject, isAnyType, isArray, isMap, isOptional, isFile, isEnum, isEnumRef, _enum, allowableValues,
+                isFreeFormObject, isAnyType, isArray, isMap, queryIsJsonMimeType, isOptional, isFile, isEnum, isEnumRef, _enum, allowableValues,
                 items, mostInnerItems, additionalProperties, vars, requiredVars, vendorExtensions, hasValidation,
                 getMaxProperties(), getMinProperties(), isNullable, isDeprecated, required, getMaximum(),
                 getExclusiveMaximum(), getMinimum(), getExclusiveMinimum(), getMaxLength(), getMinLength(),
@@ -339,6 +344,7 @@ public boolean equals(Object o) {
                 isAnyType == that.isAnyType &&
                 isArray == that.isArray &&
                 isMap == that.isMap &&
+                queryIsJsonMimeType == that.queryIsJsonMimeType &&
                 isOptional == that.isOptional &&
                 isFile == that.isFile &&
                 isEnum == that.isEnum &&
@@ -479,6 +485,7 @@ public String toString() {
         sb.append(", isAnyType=").append(isAnyType);
         sb.append(", isArray=").append(isArray);
         sb.append(", isMap=").append(isMap);
+        sb.append(", queryIsJsonMimeType=").append(queryIsJsonMimeType);
         sb.append(", isOptional=").append(isOptional);
         sb.append(", isFile=").append(isFile);
         sb.append(", isEnum=").append(isEnum);
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index a4b56b15c9cb..36530f2331e5 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -5359,6 +5359,7 @@ public CodegenParameter fromParameter(Parameter parameter, Set<String> imports)
         if (parameter instanceof QueryParameter || "query".equalsIgnoreCase(parameter.getIn())) {
             codegenParameter.isQueryParam = true;
             codegenParameter.isAllowEmptyValue = parameter.getAllowEmptyValue() != null && parameter.getAllowEmptyValue();
+            codegenParameter.queryIsJsonMimeType = isJsonMimeType(codegenParameter.contentType);
         } else if (parameter instanceof PathParameter || "path".equalsIgnoreCase(parameter.getIn())) {
             codegenParameter.required = true;
             codegenParameter.isPathParam = true;
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
index e0886f28a796..ed4287ab0fc0 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/DefaultCodegenTest.java
@@ -5006,4 +5006,15 @@ public void testSingleRequestParameter_hasSingleParamTrue() {
         // When & Then
         assertThat(codegenOperation.getHasSingleParam()).isTrue();
     }
+
+    @Test
+    public void testQueryIsJsonMimeType() {
+        DefaultCodegen codegen = new DefaultCodegen();
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/echo_api.yaml");
+        codegen.setOpenAPI(openAPI);
+        String path = "/query/style_jsonSerialization/object";
+        CodegenOperation codegenOperation = codegen.fromOperation(path, "GET", openAPI.getPaths().get(path).getGet(), null);
+
+        assertTrue(codegenOperation.queryParams.stream().allMatch(p -> p.queryIsJsonMimeType));
+    }
 }

From 42baf73083dd8b6f70c2d6814ea093b95c15d090 Mon Sep 17 00:00:00 2001
From: Mattias-Sehlstedt <60173714+Mattias-Sehlstedt@users.noreply.github.com>
Date: Sat, 9 Aug 2025 18:26:07 +0200
Subject: [PATCH 3/4] Update samples

---
 .../csharp/restsharp/net8/EchoApi/README.md   |   1 +
 .../restsharp/net8/EchoApi/api/openapi.yaml   |  31 ++
 .../restsharp/net8/EchoApi/docs/QueryApi.md   |  94 ++++++
 .../src/Org.OpenAPITools/Api/QueryApi.cs      | 203 ++++++++++++
 samples/client/echo_api/go/README.md          |   1 +
 samples/client/echo_api/go/api/openapi.yaml   |  31 ++
 samples/client/echo_api/go/api_query.go       | 117 +++++++
 samples/client/echo_api/go/docs/QueryAPI.md   |  69 ++++
 .../echo_api/java/apache-httpclient/README.md |   1 +
 .../java/apache-httpclient/api/openapi.yaml   |  33 ++
 .../java/apache-httpclient/docs/QueryApi.md   |  69 ++++
 .../org/openapitools/client/api/QueryApi.java |  73 +++++
 .../echo_api/java/feign-gson/api/openapi.yaml |  33 ++
 .../org/openapitools/client/api/QueryApi.java |  85 +++++
 samples/client/echo_api/java/native/README.md |   2 +
 .../echo_api/java/native/api/openapi.yaml     |  33 ++
 .../echo_api/java/native/docs/QueryApi.md     | 140 ++++++++
 .../org/openapitools/client/api/QueryApi.java | 123 ++++++++
 .../echo_api/java/okhttp-gson/README.md       |   1 +
 .../java/okhttp-gson/api/openapi.yaml         |  33 ++
 .../java/okhttp-gson/docs/QueryApi.md         |  65 ++++
 .../org/openapitools/client/api/QueryApi.java | 133 ++++++++
 .../client/echo_api/java/restclient/README.md |   1 +
 .../echo_api/java/restclient/api/openapi.yaml |  33 ++
 .../echo_api/java/restclient/docs/QueryApi.md |  69 ++++
 .../org/openapitools/client/api/QueryApi.java |  76 +++++
 .../client/echo_api/java/resteasy/README.md   |   1 +
 .../echo_api/java/resteasy/api/openapi.yaml   |  33 ++
 .../echo_api/java/resteasy/docs/QueryApi.md   |  69 ++++
 .../org/openapitools/client/api/QueryApi.java |  41 +++
 .../echo_api/java/resttemplate/README.md      |   1 +
 .../java/resttemplate/api/openapi.yaml        |  33 ++
 .../java/resttemplate/docs/QueryApi.md        |  69 ++++
 .../org/openapitools/client/api/QueryApi.java |  47 +++
 .../echo_api/php-nextgen-streaming/README.md  |   1 +
 .../docs/Api/QueryApi.md                      |  59 ++++
 .../src/Api/QueryApi.php                      | 298 ++++++++++++++++++
 samples/client/echo_api/php-nextgen/README.md |   1 +
 .../echo_api/php-nextgen/docs/Api/QueryApi.md |  59 ++++
 .../echo_api/php-nextgen/src/Api/QueryApi.php | 298 ++++++++++++++++++
 samples/client/echo_api/powershell/README.md  |   1 +
 .../echo_api/powershell/docs/QueryApi.md      |  49 +++
 .../src/PSOpenAPITools/Api/QueryApi.ps1       |  83 +++++
 .../README.md                                 |   1 +
 .../docs/QueryApi.md                          |  71 +++++
 .../openapi_client/api/query_api.py           | 280 ++++++++++++++++
 .../echo_api/python-pydantic-v1/README.md     |   1 +
 .../python-pydantic-v1/docs/QueryApi.md       |  70 ++++
 .../openapi_client/api/query_api.py           | 149 +++++++++
 samples/client/echo_api/python/README.md      |   1 +
 .../client/echo_api/python/docs/QueryApi.md   |  71 +++++
 .../python/openapi_client/api/query_api.py    | 280 ++++++++++++++++
 samples/client/echo_api/r/R/query_api.R       | 119 +++++++
 samples/client/echo_api/r/README.md           |   1 +
 samples/client/echo_api/r/docs/QueryApi.md    |  50 +++
 .../client/echo_api/ruby-faraday/README.md    |   1 +
 .../echo_api/ruby-faraday/docs/QueryApi.md    |  69 ++++
 .../lib/openapi_client/api/query_api.rb       |  63 ++++
 samples/client/echo_api/ruby-httpx/README.md  |   1 +
 .../echo_api/ruby-httpx/docs/QueryApi.md      |  69 ++++
 .../lib/openapi_client/api/query_api.rb       |  63 ++++
 .../client/echo_api/ruby-typhoeus/README.md   |   1 +
 .../echo_api/ruby-typhoeus/docs/QueryApi.md   |  69 ++++
 .../lib/openapi_client/api/query_api.rb       |  63 ++++
 .../echo_api/typescript-axios/build/README.md |   1 +
 .../echo_api/typescript-axios/build/api.ts    |  78 +++++
 .../typescript-axios/build/docs/QueryApi.md   |  56 ++++
 .../echo_api/erlang-server/priv/openapi.json  |  46 +++
 .../erlang-server/src/openapi_api.erl         |  22 ++
 .../src/openapi_query_handler.erl             |  17 +-
 .../erlang-server/src/openapi_router.erl      |   7 +
 71 files changed, 4412 insertions(+), 1 deletion(-)

diff --git a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/README.md b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/README.md
index 37af8fc32acb..20ef16669c9c 100644
--- a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/README.md
+++ b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/README.md
@@ -144,6 +144,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**TestQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**TestQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**TestQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**TestQueryStyleJsonSerializationObject**](docs/QueryApi.md#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 <a id="documentation-for-models"></a>
diff --git a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/api/openapi.yaml b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/api/openapi.yaml
index 871a5ab9adde..366a01195ff9 100644
--- a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/api/openapi.yaml
+++ b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/api/openapi.yaml
@@ -434,6 +434,37 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/docs/QueryApi.md b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/docs/QueryApi.md
index c740ebd3c275..c520bf7a0895 100644
--- a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/docs/QueryApi.md
+++ b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**TestQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**TestQueryStyleFormExplodeTrueObject**](QueryApi.md#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**TestQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**TestQueryStyleJsonSerializationObject**](QueryApi.md#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 <a id="testenumrefstring"></a>
 # **TestEnumRefString**
@@ -935,3 +936,96 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+<a id="testquerystylejsonserializationobject"></a>
+# **TestQueryStyleJsonSerializationObject**
+> string TestQueryStyleJsonSerializationObject (Pet? jsonSerializedObjectRefStringQuery = null, List<Pet>? jsonSerializedObjectArrayRefStringQuery = null)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+```csharp
+using System.Collections.Generic;
+using System.Diagnostics;
+using Org.OpenAPITools.Api;
+using Org.OpenAPITools.Client;
+using Org.OpenAPITools.Model;
+
+namespace Example
+{
+    public class TestQueryStyleJsonSerializationObjectExample
+    {
+        public static void Main()
+        {
+            Configuration config = new Configuration();
+            config.BasePath = "http://localhost:3000";
+            var apiInstance = new QueryApi(config);
+            var jsonSerializedObjectRefStringQuery = new Pet?(); // Pet? |  (optional) 
+            var jsonSerializedObjectArrayRefStringQuery = new List<Pet>?(); // List<Pet>? |  (optional) 
+
+            try
+            {
+                // Test query parameter(s)
+                string result = apiInstance.TestQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+                Debug.WriteLine(result);
+            }
+            catch (ApiException  e)
+            {
+                Debug.Print("Exception when calling QueryApi.TestQueryStyleJsonSerializationObject: " + e.Message);
+                Debug.Print("Status Code: " + e.ErrorCode);
+                Debug.Print(e.StackTrace);
+            }
+        }
+    }
+}
+```
+
+#### Using the TestQueryStyleJsonSerializationObjectWithHttpInfo variant
+This returns an ApiResponse object which contains the response data, status code and headers.
+
+```csharp
+try
+{
+    // Test query parameter(s)
+    ApiResponse<string> response = apiInstance.TestQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+    Debug.Write("Status Code: " + response.StatusCode);
+    Debug.Write("Response Headers: " + response.Headers);
+    Debug.Write("Response Body: " + response.Data);
+}
+catch (ApiException e)
+{
+    Debug.Print("Exception when calling QueryApi.TestQueryStyleJsonSerializationObjectWithHttpInfo: " + e.Message);
+    Debug.Print("Status Code: " + e.ErrorCode);
+    Debug.Print(e.StackTrace);
+}
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+|------|------|-------------|-------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet?**](Pet?.md) |  | [optional]  |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;?**](Pet.md) |  | [optional]  |
+
+### Return type
+
+**string**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/src/Org.OpenAPITools/Api/QueryApi.cs b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/src/Org.OpenAPITools/Api/QueryApi.cs
index a804968dc8e6..dfb566462f17 100644
--- a/samples/client/echo_api/csharp/restsharp/net8/EchoApi/src/Org.OpenAPITools/Api/QueryApi.cs
+++ b/samples/client/echo_api/csharp/restsharp/net8/EchoApi/src/Org.OpenAPITools/Api/QueryApi.cs
@@ -267,6 +267,31 @@ public interface IQueryApiSync : IApiAccessor
         /// <param name="operationIndex">Index associated with the operation.</param>
         /// <returns>ApiResponse of string</returns>
         ApiResponse<string> TestQueryStyleFormExplodeTrueObjectAllOfWithHttpInfo(DataQuery? queryObject = default, int operationIndex = 0);
+        /// <summary>
+        /// Test query parameter(s)
+        /// </summary>
+        /// <remarks>
+        /// Test query parameter(s)
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>string</returns>
+        string TestQueryStyleJsonSerializationObject(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0);
+
+        /// <summary>
+        /// Test query parameter(s)
+        /// </summary>
+        /// <remarks>
+        /// Test query parameter(s)
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>ApiResponse of string</returns>
+        ApiResponse<string> TestQueryStyleJsonSerializationObjectWithHttpInfo(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0);
         #endregion Synchronous Operations
     }
 
@@ -536,6 +561,33 @@ public interface IQueryApiAsync : IApiAccessor
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task of ApiResponse (string)</returns>
         System.Threading.Tasks.Task<ApiResponse<string>> TestQueryStyleFormExplodeTrueObjectAllOfWithHttpInfoAsync(DataQuery? queryObject = default, int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default);
+        /// <summary>
+        /// Test query parameter(s)
+        /// </summary>
+        /// <remarks>
+        /// Test query parameter(s)
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of string</returns>
+        System.Threading.Tasks.Task<string> TestQueryStyleJsonSerializationObjectAsync(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default);
+
+        /// <summary>
+        /// Test query parameter(s)
+        /// </summary>
+        /// <remarks>
+        /// Test query parameter(s)
+        /// </remarks>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of ApiResponse (string)</returns>
+        System.Threading.Tasks.Task<ApiResponse<string>> TestQueryStyleJsonSerializationObjectWithHttpInfoAsync(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default);
         #endregion Asynchronous Operations
     }
 
@@ -2150,5 +2202,156 @@ public async System.Threading.Tasks.Task<string> TestQueryStyleFormExplodeTrueOb
             return localVarResponse;
         }
 
+        /// <summary>
+        /// Test query parameter(s) Test query parameter(s)
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>string</returns>
+        public string TestQueryStyleJsonSerializationObject(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0)
+        {
+            Org.OpenAPITools.Client.ApiResponse<string> localVarResponse = TestQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            return localVarResponse.Data;
+        }
+
+        /// <summary>
+        /// Test query parameter(s) Test query parameter(s)
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <returns>ApiResponse of string</returns>
+        public Org.OpenAPITools.Client.ApiResponse<string> TestQueryStyleJsonSerializationObjectWithHttpInfo(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0)
+        {
+            Org.OpenAPITools.Client.RequestOptions localVarRequestOptions = new Org.OpenAPITools.Client.RequestOptions();
+
+            string[] _contentTypes = new string[] {
+            };
+
+            // to determine the Accept header
+            string[] _accepts = new string[] {
+                "text/plain"
+            };
+
+            var localVarContentType = Org.OpenAPITools.Client.ClientUtils.SelectHeaderContentType(_contentTypes);
+            var localVarMultipartFormData = localVarContentType == "multipart/form-data";
+            if (localVarContentType != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Content-Type", localVarContentType);
+            }
+
+            var localVarAccept = Org.OpenAPITools.Client.ClientUtils.SelectHeaderAccept(_accepts);
+            if (localVarAccept != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Accept", localVarAccept);
+            }
+
+            if (jsonSerializedObjectRefStringQuery != null)
+            {
+                localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("", "json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+            }
+            if (jsonSerializedObjectArrayRefStringQuery != null)
+            {
+                localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+            }
+
+            localVarRequestOptions.Operation = "QueryApi.TestQueryStyleJsonSerializationObject";
+            localVarRequestOptions.OperationIndex = operationIndex;
+
+
+            // make the HTTP request
+            var localVarResponse = this.Client.Get<string>("/query/style_jsonSerialization/object", localVarRequestOptions, this.Configuration);
+            if (this.ExceptionFactory != null)
+            {
+                Exception _exception = this.ExceptionFactory("TestQueryStyleJsonSerializationObject", localVarResponse);
+                if (_exception != null)
+                {
+                    throw _exception;
+                }
+            }
+
+            return localVarResponse;
+        }
+
+        /// <summary>
+        /// Test query parameter(s) Test query parameter(s)
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of string</returns>
+        public async System.Threading.Tasks.Task<string> TestQueryStyleJsonSerializationObjectAsync(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default)
+        {
+            Org.OpenAPITools.Client.ApiResponse<string> localVarResponse = await TestQueryStyleJsonSerializationObjectWithHttpInfoAsync(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, operationIndex, cancellationToken).ConfigureAwait(false);
+            return localVarResponse.Data;
+        }
+
+        /// <summary>
+        /// Test query parameter(s) Test query parameter(s)
+        /// </summary>
+        /// <exception cref="Org.OpenAPITools.Client.ApiException">Thrown when fails to make API call</exception>
+        /// <param name="jsonSerializedObjectRefStringQuery"> (optional)</param>
+        /// <param name="jsonSerializedObjectArrayRefStringQuery"> (optional)</param>
+        /// <param name="operationIndex">Index associated with the operation.</param>
+        /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
+        /// <returns>Task of ApiResponse (string)</returns>
+        public async System.Threading.Tasks.Task<Org.OpenAPITools.Client.ApiResponse<string>> TestQueryStyleJsonSerializationObjectWithHttpInfoAsync(Pet? jsonSerializedObjectRefStringQuery = default, List<Pet>? jsonSerializedObjectArrayRefStringQuery = default, int operationIndex = 0, System.Threading.CancellationToken cancellationToken = default)
+        {
+
+            Org.OpenAPITools.Client.RequestOptions localVarRequestOptions = new Org.OpenAPITools.Client.RequestOptions();
+
+            string[] _contentTypes = new string[] {
+            };
+
+            // to determine the Accept header
+            string[] _accepts = new string[] {
+                "text/plain"
+            };
+
+            var localVarContentType = Org.OpenAPITools.Client.ClientUtils.SelectHeaderContentType(_contentTypes);
+            if (localVarContentType != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Content-Type", localVarContentType);
+            }
+
+            var localVarAccept = Org.OpenAPITools.Client.ClientUtils.SelectHeaderAccept(_accepts);
+            if (localVarAccept != null)
+            {
+                localVarRequestOptions.HeaderParameters.Add("Accept", localVarAccept);
+            }
+
+            if (jsonSerializedObjectRefStringQuery != null)
+            {
+                localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("", "json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+            }
+            if (jsonSerializedObjectArrayRefStringQuery != null)
+            {
+                localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+            }
+
+            localVarRequestOptions.Operation = "QueryApi.TestQueryStyleJsonSerializationObject";
+            localVarRequestOptions.OperationIndex = operationIndex;
+
+
+            // make the HTTP request
+            var localVarResponse = await this.AsynchronousClient.GetAsync<string>("/query/style_jsonSerialization/object", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
+
+            if (this.ExceptionFactory != null)
+            {
+                Exception _exception = this.ExceptionFactory("TestQueryStyleJsonSerializationObject", localVarResponse);
+                if (_exception != null)
+                {
+                    throw _exception;
+                }
+            }
+
+            return localVarResponse;
+        }
+
     }
 }
diff --git a/samples/client/echo_api/go/README.md b/samples/client/echo_api/go/README.md
index 741605cbf656..751eca88ba6c 100644
--- a/samples/client/echo_api/go/README.md
+++ b/samples/client/echo_api/go/README.md
@@ -105,6 +105,7 @@ Class | Method | HTTP request | Description
 *QueryAPI* | [**TestQueryStyleFormExplodeTrueArrayString**](docs/QueryAPI.md#testquerystyleformexplodetruearraystring) | **Get** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryAPI* | [**TestQueryStyleFormExplodeTrueObject**](docs/QueryAPI.md#testquerystyleformexplodetrueobject) | **Get** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryAPI* | [**TestQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryAPI.md#testquerystyleformexplodetrueobjectallof) | **Get** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryAPI* | [**TestQueryStyleJsonSerializationObject**](docs/QueryAPI.md#testquerystylejsonserializationobject) | **Get** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation For Models
diff --git a/samples/client/echo_api/go/api/openapi.yaml b/samples/client/echo_api/go/api/openapi.yaml
index cce790b6a1ad..eb05cdd20723 100644
--- a/samples/client/echo_api/go/api/openapi.yaml
+++ b/samples/client/echo_api/go/api/openapi.yaml
@@ -434,6 +434,37 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/go/api_query.go b/samples/client/echo_api/go/api_query.go
index bad8fb08f393..b5dedc9fa32d 100644
--- a/samples/client/echo_api/go/api_query.go
+++ b/samples/client/echo_api/go/api_query.go
@@ -1148,3 +1148,120 @@ func (a *QueryAPIService) TestQueryStyleFormExplodeTrueObjectAllOfExecute(r ApiT
 
 	return localVarReturnValue, localVarHTTPResponse, nil
 }
+
+type ApiTestQueryStyleJsonSerializationObjectRequest struct {
+	ctx context.Context
+	ApiService *QueryAPIService
+	jsonSerializedObjectRefStringQuery *Pet
+	jsonSerializedObjectArrayRefStringQuery *[]Pet
+}
+
+func (r ApiTestQueryStyleJsonSerializationObjectRequest) JsonSerializedObjectRefStringQuery(jsonSerializedObjectRefStringQuery Pet) ApiTestQueryStyleJsonSerializationObjectRequest {
+	r.jsonSerializedObjectRefStringQuery = &jsonSerializedObjectRefStringQuery
+	return r
+}
+
+func (r ApiTestQueryStyleJsonSerializationObjectRequest) JsonSerializedObjectArrayRefStringQuery(jsonSerializedObjectArrayRefStringQuery []Pet) ApiTestQueryStyleJsonSerializationObjectRequest {
+	r.jsonSerializedObjectArrayRefStringQuery = &jsonSerializedObjectArrayRefStringQuery
+	return r
+}
+
+func (r ApiTestQueryStyleJsonSerializationObjectRequest) Execute() (string, *http.Response, error) {
+	return r.ApiService.TestQueryStyleJsonSerializationObjectExecute(r)
+}
+
+/*
+TestQueryStyleJsonSerializationObject Test query parameter(s)
+
+Test query parameter(s)
+
+ @param ctx context.Context - for authentication, logging, cancellation, deadlines, tracing, etc. Passed from http.Request or context.Background().
+ @return ApiTestQueryStyleJsonSerializationObjectRequest
+*/
+func (a *QueryAPIService) TestQueryStyleJsonSerializationObject(ctx context.Context) ApiTestQueryStyleJsonSerializationObjectRequest {
+	return ApiTestQueryStyleJsonSerializationObjectRequest{
+		ApiService: a,
+		ctx: ctx,
+	}
+}
+
+// Execute executes the request
+//  @return string
+func (a *QueryAPIService) TestQueryStyleJsonSerializationObjectExecute(r ApiTestQueryStyleJsonSerializationObjectRequest) (string, *http.Response, error) {
+	var (
+		localVarHTTPMethod   = http.MethodGet
+		localVarPostBody     interface{}
+		formFiles            []formFile
+		localVarReturnValue  string
+	)
+
+	localBasePath, err := a.client.cfg.ServerURLWithContext(r.ctx, "QueryAPIService.TestQueryStyleJsonSerializationObject")
+	if err != nil {
+		return localVarReturnValue, nil, &GenericOpenAPIError{error: err.Error()}
+	}
+
+	localVarPath := localBasePath + "/query/style_jsonSerialization/object"
+
+	localVarHeaderParams := make(map[string]string)
+	localVarQueryParams := url.Values{}
+	localVarFormParams := url.Values{}
+
+	if r.jsonSerializedObjectRefStringQuery != nil {
+		parameterAddToHeaderOrQuery(localVarQueryParams, "json_serialized_object_ref_string_query", r.jsonSerializedObjectRefStringQuery, "", "")
+	}
+	if r.jsonSerializedObjectArrayRefStringQuery != nil {
+		parameterAddToHeaderOrQuery(localVarQueryParams, "json_serialized_object_array_ref_string_query", r.jsonSerializedObjectArrayRefStringQuery, "", "csv")
+	}
+	// to determine the Content-Type header
+	localVarHTTPContentTypes := []string{}
+
+	// set Content-Type header
+	localVarHTTPContentType := selectHeaderContentType(localVarHTTPContentTypes)
+	if localVarHTTPContentType != "" {
+		localVarHeaderParams["Content-Type"] = localVarHTTPContentType
+	}
+
+	// to determine the Accept header
+	localVarHTTPHeaderAccepts := []string{"text/plain"}
+
+	// set Accept header
+	localVarHTTPHeaderAccept := selectHeaderAccept(localVarHTTPHeaderAccepts)
+	if localVarHTTPHeaderAccept != "" {
+		localVarHeaderParams["Accept"] = localVarHTTPHeaderAccept
+	}
+	req, err := a.client.prepareRequest(r.ctx, localVarPath, localVarHTTPMethod, localVarPostBody, localVarHeaderParams, localVarQueryParams, localVarFormParams, formFiles)
+	if err != nil {
+		return localVarReturnValue, nil, err
+	}
+
+	localVarHTTPResponse, err := a.client.callAPI(req)
+	if err != nil || localVarHTTPResponse == nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	localVarBody, err := io.ReadAll(localVarHTTPResponse.Body)
+	localVarHTTPResponse.Body.Close()
+	localVarHTTPResponse.Body = io.NopCloser(bytes.NewBuffer(localVarBody))
+	if err != nil {
+		return localVarReturnValue, localVarHTTPResponse, err
+	}
+
+	if localVarHTTPResponse.StatusCode >= 300 {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: localVarHTTPResponse.Status,
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	err = a.client.decode(&localVarReturnValue, localVarBody, localVarHTTPResponse.Header.Get("Content-Type"))
+	if err != nil {
+		newErr := &GenericOpenAPIError{
+			body:  localVarBody,
+			error: err.Error(),
+		}
+		return localVarReturnValue, localVarHTTPResponse, newErr
+	}
+
+	return localVarReturnValue, localVarHTTPResponse, nil
+}
diff --git a/samples/client/echo_api/go/docs/QueryAPI.md b/samples/client/echo_api/go/docs/QueryAPI.md
index a62e1eb6bbcf..c21d13458ea9 100644
--- a/samples/client/echo_api/go/docs/QueryAPI.md
+++ b/samples/client/echo_api/go/docs/QueryAPI.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**TestQueryStyleFormExplodeTrueArrayString**](QueryAPI.md#TestQueryStyleFormExplodeTrueArrayString) | **Get** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**TestQueryStyleFormExplodeTrueObject**](QueryAPI.md#TestQueryStyleFormExplodeTrueObject) | **Get** /query/style_form/explode_true/object | Test query parameter(s)
 [**TestQueryStyleFormExplodeTrueObjectAllOf**](QueryAPI.md#TestQueryStyleFormExplodeTrueObjectAllOf) | **Get** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**TestQueryStyleJsonSerializationObject**](QueryAPI.md#TestQueryStyleJsonSerializationObject) | **Get** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 
@@ -687,3 +688,71 @@ No authorization required
 [[Back to Model list]](../README.md#documentation-for-models)
 [[Back to README]](../README.md)
 
+
+## TestQueryStyleJsonSerializationObject
+
+> string TestQueryStyleJsonSerializationObject(ctx).JsonSerializedObjectRefStringQuery(jsonSerializedObjectRefStringQuery).JsonSerializedObjectArrayRefStringQuery(jsonSerializedObjectArrayRefStringQuery).Execute()
+
+Test query parameter(s)
+
+
+
+### Example
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	openapiclient "github.com/GIT_USER_ID/GIT_REPO_ID"
+)
+
+func main() {
+	jsonSerializedObjectRefStringQuery := *openapiclient.NewPet("doggie", []string{"PhotoUrls_example"}) // Pet |  (optional)
+	jsonSerializedObjectArrayRefStringQuery := []openapiclient.Pet{*openapiclient.NewPet("doggie", []string{"PhotoUrls_example"})} // []Pet |  (optional)
+
+	configuration := openapiclient.NewConfiguration()
+	apiClient := openapiclient.NewAPIClient(configuration)
+	resp, r, err := apiClient.QueryAPI.TestQueryStyleJsonSerializationObject(context.Background()).JsonSerializedObjectRefStringQuery(jsonSerializedObjectRefStringQuery).JsonSerializedObjectArrayRefStringQuery(jsonSerializedObjectArrayRefStringQuery).Execute()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error when calling `QueryAPI.TestQueryStyleJsonSerializationObject``: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r)
+	}
+	// response from `TestQueryStyleJsonSerializationObject`: string
+	fmt.Fprintf(os.Stdout, "Response from `QueryAPI.TestQueryStyleJsonSerializationObject`: %v\n", resp)
+}
+```
+
+### Path Parameters
+
+
+
+### Other Parameters
+
+Other parameters are passed through a pointer to a apiTestQueryStyleJsonSerializationObjectRequest struct via the builder pattern
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **jsonSerializedObjectRefStringQuery** | [**Pet**](Pet.md) |  | 
+ **jsonSerializedObjectArrayRefStringQuery** | [**[]Pet**](Pet.md) |  | 
+
+### Return type
+
+**string**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints)
+[[Back to Model list]](../README.md#documentation-for-models)
+[[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/java/apache-httpclient/README.md b/samples/client/echo_api/java/apache-httpclient/README.md
index 0c8998f3561b..42b5e11a3f86 100644
--- a/samples/client/echo_api/java/apache-httpclient/README.md
+++ b/samples/client/echo_api/java/apache-httpclient/README.md
@@ -139,6 +139,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml b/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
+++ b/samples/client/echo_api/java/apache-httpclient/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/apache-httpclient/docs/QueryApi.md b/samples/client/echo_api/java/apache-httpclient/docs/QueryApi.md
index 45813a191fed..1f92d4a7b9e5 100644
--- a/samples/client/echo_api/java/apache-httpclient/docs/QueryApi.md
+++ b/samples/client/echo_api/java/apache-httpclient/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 
@@ -686,3 +687,71 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testQueryStyleJsonSerializationObject
+
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/QueryApi.java
index 319489537d07..b3563322990a 100644
--- a/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -739,6 +739,79 @@ public String testQueryStyleFormExplodeTrueObjectAllOf(@javax.annotation.Nullabl
 
     
     
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "GET",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+    return this.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, Collections.emptyMap());
+  }
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @param additionalHeaders additionalHeaders for this call
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, Map<String, String> additionalHeaders) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/query/style_jsonSerialization/object";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPair("json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+    
+    localVarHeaderParams.putAll(additionalHeaders);
+
+    
+    
     final String[] localVarAccepts = {
       "text/plain"
     };
diff --git a/samples/client/echo_api/java/feign-gson/api/openapi.yaml b/samples/client/echo_api/java/feign-gson/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/feign-gson/api/openapi.yaml
+++ b/samples/client/echo_api/java/feign-gson/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/QueryApi.java
index 8075fd71baf4..6e79873ab22d 100644
--- a/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -831,4 +831,89 @@ public TestQueryStyleFormExplodeTrueObjectAllOfQueryParams queryObject(@javax.an
       return this;
     }
   }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return String
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+    "Accept: text/plain",
+  })
+  String testQueryStyleJsonSerializationObject(@Param("jsonSerializedObjectRefStringQuery") @javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @Param("jsonSerializedObjectArrayRefStringQuery") @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery);
+
+  /**
+   * Test query parameter(s)
+   * Similar to <code>testQueryStyleJsonSerializationObject</code> but it also returns the http response headers .
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@Param("jsonSerializedObjectRefStringQuery") @javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @Param("jsonSerializedObjectArrayRefStringQuery") @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery);
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * Note, this is equivalent to the other <code>testQueryStyleJsonSerializationObject</code> method,
+   * but with the query parameters collected into a single Map parameter. This
+   * is convenient for services with optional query parameters, especially when
+   * used with the {@link TestQueryStyleJsonSerializationObjectQueryParams} class that allows for
+   * building up this map in a fluent style.
+   * @param queryParams Map of query parameters as name-value pairs
+   *   <p>The following elements may be specified in the query map:</p>
+   *   <ul>
+   *   <li>jsonSerializedObjectRefStringQuery -  (optional)</li>
+   *   <li>jsonSerializedObjectArrayRefStringQuery -  (optional)</li>
+   *   </ul>
+   * @return String
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+  "Accept: text/plain",
+  })
+  String testQueryStyleJsonSerializationObject(@QueryMap(encoded=true) TestQueryStyleJsonSerializationObjectQueryParams queryParams);
+
+  /**
+  * Test query parameter(s)
+  * Test query parameter(s)
+  * Note, this is equivalent to the other <code>testQueryStyleJsonSerializationObject</code> that receives the query parameters as a map,
+  * but this one also exposes the Http response headers
+      * @param queryParams Map of query parameters as name-value pairs
+      *   <p>The following elements may be specified in the query map:</p>
+      *   <ul>
+          *   <li>jsonSerializedObjectRefStringQuery -  (optional)</li>
+          *   <li>jsonSerializedObjectArrayRefStringQuery -  (optional)</li>
+      *   </ul>
+          * @return String
+      */
+      @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+      @Headers({
+    "Accept: text/plain",
+      })
+   ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@QueryMap(encoded=true) TestQueryStyleJsonSerializationObjectQueryParams queryParams);
+
+
+   /**
+   * A convenience class for generating query parameters for the
+   * <code>testQueryStyleJsonSerializationObject</code> method in a fluent style.
+   */
+  public static class TestQueryStyleJsonSerializationObjectQueryParams extends HashMap<String, Object> {
+    public TestQueryStyleJsonSerializationObjectQueryParams jsonSerializedObjectRefStringQuery(@javax.annotation.Nullable final Pet value) {
+      put("json_serialized_object_ref_string_query", EncodingUtils.encode(value));
+      return this;
+    }
+    public TestQueryStyleJsonSerializationObjectQueryParams jsonSerializedObjectArrayRefStringQuery(@javax.annotation.Nullable final List<Pet> value) {
+      put("json_serialized_object_array_ref_string_query", EncodingUtils.encodeCollection(value, "csv"));
+      return this;
+    }
+  }
 }
diff --git a/samples/client/echo_api/java/native/README.md b/samples/client/echo_api/java/native/README.md
index 52cda6522969..2db0155a42fc 100644
--- a/samples/client/echo_api/java/native/README.md
+++ b/samples/client/echo_api/java/native/README.md
@@ -160,6 +160,8 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectWithHttpInfo**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectWithHttpInfo) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOfWithHttpInfo**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOfWithHttpInfo) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObjectWithHttpInfo**](docs/QueryApi.md#testQueryStyleJsonSerializationObjectWithHttpInfo) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/native/api/openapi.yaml b/samples/client/echo_api/java/native/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/native/api/openapi.yaml
+++ b/samples/client/echo_api/java/native/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/native/docs/QueryApi.md b/samples/client/echo_api/java/native/docs/QueryApi.md
index 5d29a7640be3..b45c540fa369 100644
--- a/samples/client/echo_api/java/native/docs/QueryApi.md
+++ b/samples/client/echo_api/java/native/docs/QueryApi.md
@@ -24,6 +24,8 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueObjectWithHttpInfo**](QueryApi.md#testQueryStyleFormExplodeTrueObjectWithHttpInfo) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOfWithHttpInfo**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOfWithHttpInfo) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObjectWithHttpInfo**](QueryApi.md#testQueryStyleJsonSerializationObjectWithHttpInfo) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 
@@ -1386,3 +1388,141 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testQueryStyleJsonSerializationObject
+
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testQueryStyleJsonSerializationObjectWithHttpInfo
+
+> ApiResponse<String> testQueryStyleJsonSerializationObject testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            ApiResponse<String> response = apiInstance.testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/QueryApi.java
index aa237e5b0fba..d34cf28f843f 100644
--- a/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -1378,4 +1378,127 @@ private HttpRequest.Builder testQueryStyleFormExplodeTrueObjectAllOfRequestBuild
     return localVarRequestBuilder;
   }
 
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+    return testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, null);
+  }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @param headers Optional headers to include in the request
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, Map<String, String> headers) throws ApiException {
+    ApiResponse<String> localVarResponse = testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, headers);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+    return testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, null);
+  }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @param headers Optional headers to include in the request
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, Map<String, String> headers) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testQueryStyleJsonSerializationObjectRequestBuilder(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, headers);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testQueryStyleJsonSerializationObject", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0).split(";")[0].trim())) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testQueryStyleJsonSerializationObjectRequestBuilder(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, Map<String, String> headers) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/query/style_jsonSerialization/object";
+
+    List<Pair> localVarQueryParams = new ArrayList<>();
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    localVarQueryParameterBaseName = "json_serialized_object_ref_string_query";
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+    localVarQueryParameterBaseName = "json_serialized_object_array_ref_string_query";
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+
+    if (!localVarQueryParams.isEmpty() || localVarQueryStringJoiner.length() != 0) {
+      StringJoiner queryJoiner = new StringJoiner("&");
+      localVarQueryParams.forEach(p -> queryJoiner.add(p.getName() + '=' + p.getValue()));
+      if (localVarQueryStringJoiner.length() != 0) {
+        queryJoiner.add(localVarQueryStringJoiner.toString());
+      }
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath + '?' + queryJoiner.toString()));
+    } else {
+      localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+    }
+
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    // Add custom headers if provided
+    localVarRequestBuilder = HttpRequestBuilderExtensions.withAdditionalHeaders(localVarRequestBuilder, headers);
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+
 }
diff --git a/samples/client/echo_api/java/okhttp-gson/README.md b/samples/client/echo_api/java/okhttp-gson/README.md
index cb8ed368ce94..689066005dab 100644
--- a/samples/client/echo_api/java/okhttp-gson/README.md
+++ b/samples/client/echo_api/java/okhttp-gson/README.md
@@ -146,6 +146,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml b/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
+++ b/samples/client/echo_api/java/okhttp-gson/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/okhttp-gson/docs/QueryApi.md b/samples/client/echo_api/java/okhttp-gson/docs/QueryApi.md
index 28597ee3e735..7a5fb4dc09d8 100644
--- a/samples/client/echo_api/java/okhttp-gson/docs/QueryApi.md
+++ b/samples/client/echo_api/java/okhttp-gson/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 <a id="testEnumRefString"></a>
@@ -646,3 +647,67 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+<a id="testQueryStyleJsonSerializationObject"></a>
+# **testQueryStyleJsonSerializationObject**
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    QueryApi apiInstance = new QueryApi(defaultClient);
+    Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+    List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+    try {
+      String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/QueryApi.java
index 8c7b967515cf..bdf8e6153298 100644
--- a/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -1368,4 +1368,137 @@ public okhttp3.Call testQueryStyleFormExplodeTrueObjectAllOfAsync(@javax.annotat
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for testQueryStyleJsonSerializationObject
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testQueryStyleJsonSerializationObjectCall(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = null;
+
+        // create path and map variables
+        String localVarPath = "/query/style_jsonSerialization/object";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        if (jsonSerializedObjectRefStringQuery != null) {
+            localVarQueryParams.addAll(localVarApiClient.parameterToPair("json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+        }
+
+        if (jsonSerializedObjectArrayRefStringQuery != null) {
+            localVarCollectionQueryParams.addAll(localVarApiClient.parameterToPairs("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+        }
+
+        final String[] localVarAccepts = {
+            "text/plain"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testQueryStyleJsonSerializationObjectValidateBeforeCall(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, final ApiCallback _callback) throws ApiException {
+        return testQueryStyleJsonSerializationObjectCall(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, _callback);
+
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @return String
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+        ApiResponse<String> localVarResp = testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @return ApiResponse&lt;String&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+        okhttp3.Call localVarCall = testQueryStyleJsonSerializationObjectValidateBeforeCall(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test query parameter(s) (asynchronously)
+     * Test query parameter(s)
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table border="1">
+       <caption>Response Details</caption>
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testQueryStyleJsonSerializationObjectAsync(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testQueryStyleJsonSerializationObjectValidateBeforeCall(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
 }
diff --git a/samples/client/echo_api/java/restclient/README.md b/samples/client/echo_api/java/restclient/README.md
index 97266780a574..e8b65a062fbd 100644
--- a/samples/client/echo_api/java/restclient/README.md
+++ b/samples/client/echo_api/java/restclient/README.md
@@ -146,6 +146,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/restclient/api/openapi.yaml b/samples/client/echo_api/java/restclient/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/restclient/api/openapi.yaml
+++ b/samples/client/echo_api/java/restclient/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/restclient/docs/QueryApi.md b/samples/client/echo_api/java/restclient/docs/QueryApi.md
index cf13bcbda571..b94754d38939 100644
--- a/samples/client/echo_api/java/restclient/docs/QueryApi.md
+++ b/samples/client/echo_api/java/restclient/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 
@@ -686,3 +687,71 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testQueryStyleJsonSerializationObject
+
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/restclient/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/restclient/src/main/java/org/openapitools/client/api/QueryApi.java
index 0f58b5e3cc08..22c9a9dd110f 100644
--- a/samples/client/echo_api/java/restclient/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/restclient/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -794,4 +794,80 @@ public ResponseEntity<String> testQueryStyleFormExplodeTrueObjectAllOfWithHttpIn
     public ResponseSpec testQueryStyleFormExplodeTrueObjectAllOfWithResponseSpec(@jakarta.annotation.Nullable DataQuery queryObject) throws RestClientResponseException {
         return testQueryStyleFormExplodeTrueObjectAllOfRequestCreation(queryObject);
     }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery The jsonSerializedObjectRefStringQuery parameter
+     * @param jsonSerializedObjectArrayRefStringQuery The jsonSerializedObjectArrayRefStringQuery parameter
+     * @return String
+     * @throws RestClientResponseException if an error occurs while attempting to invoke the API
+     */
+    private ResponseSpec testQueryStyleJsonSerializationObjectRequestCreation(@jakarta.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @jakarta.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientResponseException {
+        Object postBody = null;
+        // create path and map variables
+        final Map<String, Object> pathParams = new HashMap<>();
+
+        final MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<>();
+        final HttpHeaders headerParams = new HttpHeaders();
+        final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<>();
+        final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<>();
+
+        queryParams.putAll(apiClient.parameterToMultiValueMap(null, "json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+        
+        final String[] localVarAccepts = { 
+            "text/plain"
+        };
+        final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        final String[] localVarContentTypes = { };
+        final MediaType localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+        String[] localVarAuthNames = new String[] {  };
+
+        ParameterizedTypeReference<String> localVarReturnType = new ParameterizedTypeReference<>() {};
+        return apiClient.invokeAPI("/query/style_jsonSerialization/object", HttpMethod.GET, pathParams, queryParams, postBody, headerParams, cookieParams, formParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery The jsonSerializedObjectRefStringQuery parameter
+     * @param jsonSerializedObjectArrayRefStringQuery The jsonSerializedObjectArrayRefStringQuery parameter
+     * @return String
+     * @throws RestClientResponseException if an error occurs while attempting to invoke the API
+     */
+    public String testQueryStyleJsonSerializationObject(@jakarta.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @jakarta.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientResponseException {
+        ParameterizedTypeReference<String> localVarReturnType = new ParameterizedTypeReference<>() {};
+        return testQueryStyleJsonSerializationObjectRequestCreation(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery).body(localVarReturnType);
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery The jsonSerializedObjectRefStringQuery parameter
+     * @param jsonSerializedObjectArrayRefStringQuery The jsonSerializedObjectArrayRefStringQuery parameter
+     * @return ResponseEntity&lt;String&gt;
+     * @throws RestClientResponseException if an error occurs while attempting to invoke the API
+     */
+    public ResponseEntity<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@jakarta.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @jakarta.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientResponseException {
+        ParameterizedTypeReference<String> localVarReturnType = new ParameterizedTypeReference<>() {};
+        return testQueryStyleJsonSerializationObjectRequestCreation(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery).toEntity(localVarReturnType);
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery The jsonSerializedObjectRefStringQuery parameter
+     * @param jsonSerializedObjectArrayRefStringQuery The jsonSerializedObjectArrayRefStringQuery parameter
+     * @return ResponseSpec
+     * @throws RestClientResponseException if an error occurs while attempting to invoke the API
+     */
+    public ResponseSpec testQueryStyleJsonSerializationObjectWithResponseSpec(@jakarta.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @jakarta.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientResponseException {
+        return testQueryStyleJsonSerializationObjectRequestCreation(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+    }
 }
diff --git a/samples/client/echo_api/java/resteasy/README.md b/samples/client/echo_api/java/resteasy/README.md
index c4d8e439ee3a..63aa8d97f5cb 100644
--- a/samples/client/echo_api/java/resteasy/README.md
+++ b/samples/client/echo_api/java/resteasy/README.md
@@ -146,6 +146,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/resteasy/api/openapi.yaml b/samples/client/echo_api/java/resteasy/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/resteasy/api/openapi.yaml
+++ b/samples/client/echo_api/java/resteasy/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/resteasy/docs/QueryApi.md b/samples/client/echo_api/java/resteasy/docs/QueryApi.md
index 45813a191fed..1f92d4a7b9e5 100644
--- a/samples/client/echo_api/java/resteasy/docs/QueryApi.md
+++ b/samples/client/echo_api/java/resteasy/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 
@@ -686,3 +687,71 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testQueryStyleJsonSerializationObject
+
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/QueryApi.java
index 1a4dd96beff1..f851e4e6dfb9 100644
--- a/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/resteasy/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -425,6 +425,47 @@ public String testQueryStyleFormExplodeTrueObjectAllOf(@javax.annotation.Nullabl
     
     
     
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<String> localVarReturnType = new GenericType<String>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return a {@code String}
+   * @throws ApiException if fails to make API call
+   */
+  public String testQueryStyleJsonSerializationObject(@javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/query/style_jsonSerialization/object".replaceAll("\\{format\\}","json");
+
+    // query params
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPairs("", "json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+
+    
+    
+    
     final String[] localVarAccepts = {
       "text/plain"
     };
diff --git a/samples/client/echo_api/java/resttemplate/README.md b/samples/client/echo_api/java/resttemplate/README.md
index 991d524538b9..1f9a0229ae52 100644
--- a/samples/client/echo_api/java/resttemplate/README.md
+++ b/samples/client/echo_api/java/resttemplate/README.md
@@ -146,6 +146,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/java/resttemplate/api/openapi.yaml b/samples/client/echo_api/java/resttemplate/api/openapi.yaml
index af545234bfb0..19c965868738 100644
--- a/samples/client/echo_api/java/resttemplate/api/openapi.yaml
+++ b/samples/client/echo_api/java/resttemplate/api/openapi.yaml
@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
diff --git a/samples/client/echo_api/java/resttemplate/docs/QueryApi.md b/samples/client/echo_api/java/resttemplate/docs/QueryApi.md
index 45813a191fed..1f92d4a7b9e5 100644
--- a/samples/client/echo_api/java/resttemplate/docs/QueryApi.md
+++ b/samples/client/echo_api/java/resttemplate/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**testQueryStyleFormExplodeTrueArrayString**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 
@@ -686,3 +687,71 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testQueryStyleJsonSerializationObject
+
+> String testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.QueryApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        QueryApi apiInstance = new QueryApi(defaultClient);
+        Pet jsonSerializedObjectRefStringQuery = new Pet(); // Pet | 
+        List<Pet> jsonSerializedObjectArrayRefStringQuery = Arrays.asList(); // List<Pet> | 
+        try {
+            String result = apiInstance.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling QueryApi#testQueryStyleJsonSerializationObject");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | [**Pet**](.md)|  | [optional] |
+| **jsonSerializedObjectArrayRefStringQuery** | [**List&lt;Pet&gt;**](Pet.md)|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
index 43a87c7d644c..f96d841c0334 100644
--- a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -514,6 +514,53 @@ public ResponseEntity<String> testQueryStyleFormExplodeTrueObjectAllOfWithHttpIn
         ParameterizedTypeReference<String> localReturnType = new ParameterizedTypeReference<String>() {};
         return apiClient.invokeAPI("/query/style_form/explode_true/object/allOf", HttpMethod.GET, Collections.<String, Object>emptyMap(), localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localReturnType);
     }
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @return String
+     * @throws RestClientException if an error occurs while attempting to invoke the API
+     */
+    public String testQueryStyleJsonSerializationObject(Pet jsonSerializedObjectRefStringQuery, List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientException {
+        return testQueryStyleJsonSerializationObjectWithHttpInfo(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery).getBody();
+    }
+
+    /**
+     * Test query parameter(s)
+     * Test query parameter(s)
+     * <p><b>200</b> - Successful operation
+     * @param jsonSerializedObjectRefStringQuery  (optional)
+     * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+     * @return ResponseEntity&lt;String&gt;
+     * @throws RestClientException if an error occurs while attempting to invoke the API
+     */
+    public ResponseEntity<String> testQueryStyleJsonSerializationObjectWithHttpInfo(Pet jsonSerializedObjectRefStringQuery, List<Pet> jsonSerializedObjectArrayRefStringQuery) throws RestClientException {
+        Object localVarPostBody = null;
+        
+
+        final MultiValueMap<String, String> localVarQueryParams = new LinkedMultiValueMap<String, String>();
+        final HttpHeaders localVarHeaderParams = new HttpHeaders();
+        final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
+        final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
+
+        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "json_serialized_object_ref_string_query", jsonSerializedObjectRefStringQuery));
+        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "json_serialized_object_array_ref_string_query", jsonSerializedObjectArrayRefStringQuery));
+        
+
+        final String[] localVarAccepts = { 
+            "text/plain"
+         };
+        final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        final String[] localVarContentTypes = {  };
+        final MediaType localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+        String[] localVarAuthNames = new String[] {  };
+
+        ParameterizedTypeReference<String> localReturnType = new ParameterizedTypeReference<String>() {};
+        return apiClient.invokeAPI("/query/style_jsonSerialization/object", HttpMethod.GET, Collections.<String, Object>emptyMap(), localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localReturnType);
+    }
 
     @Override
     public <T> ResponseEntity<T> invokeAPI(String url, HttpMethod method, Object request, ParameterizedTypeReference<T> returnType) throws RestClientException {
diff --git a/samples/client/echo_api/php-nextgen-streaming/README.md b/samples/client/echo_api/php-nextgen-streaming/README.md
index 6563e0d3df07..00a5d0d0f170 100644
--- a/samples/client/echo_api/php-nextgen-streaming/README.md
+++ b/samples/client/echo_api/php-nextgen-streaming/README.md
@@ -103,6 +103,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/Api/QueryApi.md#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/Api/QueryApi.md#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/Api/QueryApi.md#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/Api/QueryApi.md#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 ## Models
 
diff --git a/samples/client/echo_api/php-nextgen-streaming/docs/Api/QueryApi.md b/samples/client/echo_api/php-nextgen-streaming/docs/Api/QueryApi.md
index ae6ca5170395..e6c78ff48794 100644
--- a/samples/client/echo_api/php-nextgen-streaming/docs/Api/QueryApi.md
+++ b/samples/client/echo_api/php-nextgen-streaming/docs/Api/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to http://localhost:3000, except if the operation defines
 | [**testQueryStyleFormExplodeTrueArrayString()**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject()**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf()**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject()**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 ## `testEnumRefString()`
@@ -585,3 +586,61 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
 [[Back to Model list]](../../README.md#models)
 [[Back to README]](../../README.md)
+
+## `testQueryStyleJsonSerializationObject()`
+
+```php
+testQueryStyleJsonSerializationObject($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query): string
+```
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+
+
+$apiInstance = new OpenAPI\Client\Api\QueryApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client()
+);
+$json_serialized_object_ref_string_query = new \OpenAPI\Client\Model\\OpenAPI\Client\Model\Pet(); // \OpenAPI\Client\Model\Pet
+$json_serialized_object_array_ref_string_query = array(new \OpenAPI\Client\Model\\OpenAPI\Client\Model\Pet()); // \OpenAPI\Client\Model\Pet[]
+
+try {
+    $result = $apiInstance->testQueryStyleJsonSerializationObject($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query);
+    print_r($result);
+} catch (Exception $e) {
+    echo 'Exception when calling QueryApi->testQueryStyleJsonSerializationObject: ', $e->getMessage(), PHP_EOL;
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+| ------------- | ------------- | ------------- | ------------- |
+| **json_serialized_object_ref_string_query** | [**\OpenAPI\Client\Model\Pet**](../Model/.md)|  | [optional] |
+| **json_serialized_object_array_ref_string_query** | [**\OpenAPI\Client\Model\Pet[]**](../Model/\OpenAPI\Client\Model\Pet.md)|  | [optional] |
+
+### Return type
+
+**string**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: `text/plain`
+
+[[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
+[[Back to Model list]](../../README.md#models)
+[[Back to README]](../../README.md)
diff --git a/samples/client/echo_api/php-nextgen-streaming/src/Api/QueryApi.php b/samples/client/echo_api/php-nextgen-streaming/src/Api/QueryApi.php
index b78226f02a23..4ffdc7d4b998 100644
--- a/samples/client/echo_api/php-nextgen-streaming/src/Api/QueryApi.php
+++ b/samples/client/echo_api/php-nextgen-streaming/src/Api/QueryApi.php
@@ -105,6 +105,9 @@ class QueryApi
         'testQueryStyleFormExplodeTrueObjectAllOf' => [
             'application/json',
         ],
+        'testQueryStyleJsonSerializationObject' => [
+            'application/json',
+        ],
     ];
 
     /**
@@ -2950,6 +2953,301 @@ public function testQueryStyleFormExplodeTrueObjectAllOfRequest(
 
 
 
+        $headers = $this->headerSelector->selectHeaders(
+            ['text/plain', ],
+            $contentType,
+            $multipart
+        );
+
+        // for model (json/xml)
+        if (count($formParams) > 0) {
+            if ($multipart) {
+                $multipartContents = [];
+                foreach ($formParams as $formParamName => $formParamValue) {
+                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
+                    foreach ($formParamValueItems as $formParamValueItem) {
+                        $multipartContents[] = [
+                            'name' => $formParamName,
+                            'contents' => $formParamValueItem
+                        ];
+                    }
+                }
+                // for HTTP post (form)
+                $httpBody = new MultipartStream($multipartContents);
+
+            } elseif (stripos($headers['Content-Type'], 'application/json') !== false) {
+                # if Content-Type contains "application/json", json_encode the form parameters
+                $httpBody = \GuzzleHttp\Utils::jsonEncode($formParams);
+            } else {
+                // for HTTP post (form)
+                $httpBody = ObjectSerializer::buildQuery($formParams);
+            }
+        }
+
+
+        $defaultHeaders = [];
+        if ($this->config->getUserAgent()) {
+            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
+        }
+
+        $headers = array_merge(
+            $defaultHeaders,
+            $headerParams,
+            $headers
+        );
+
+        $operationHost = $this->config->getHost();
+        $query = ObjectSerializer::buildQuery($queryParams);
+        return new Request(
+            'GET',
+            $operationHost . $resourcePath . ($query ? "?{$query}" : ''),
+            $headers,
+            $httpBody
+        );
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObject
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return string
+     */
+    public function testQueryStyleJsonSerializationObject(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): string
+    {
+        list($response) = $this->testQueryStyleJsonSerializationObjectWithHttpInfo($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+        return $response;
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectWithHttpInfo
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return array of string, HTTP status code, HTTP response headers (array of strings)
+     */
+    public function testQueryStyleJsonSerializationObjectWithHttpInfo(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): array
+    {
+        $request = $this->testQueryStyleJsonSerializationObjectRequest($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+
+        try {
+            $options = $this->createHttpClientOption();
+            try {
+                $response = $this->client->send($request, $options);
+            } catch (RequestException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
+                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
+                );
+            } catch (ConnectException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    null,
+                    null
+                );
+            }
+
+            $statusCode = $response->getStatusCode();
+
+            switch($statusCode) {
+                case 200:
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
+            }
+            
+
+            if ($statusCode < 200 || $statusCode > 299) {
+                throw new ApiException(
+                    sprintf(
+                        '[%d] Error connecting to the API (%s)',
+                        $statusCode,
+                        (string) $request->getUri()
+                    ),
+                    $statusCode,
+                    $response->getHeaders(),
+                    (string) $response->getBody()
+                );
+            }
+
+            return $this->handleResponseWithDataType(
+                'string',
+                $request,
+                $response,
+            );
+        } catch (ApiException $e) {
+            switch ($e->getCode()) {
+                case 200:
+                    $data = ObjectSerializer::deserialize(
+                        $e->getResponseBody(),
+                        'string',
+                        $e->getResponseHeaders()
+                    );
+                    $e->setResponseObject($data);
+                    throw $e;
+            }
+        
+            throw $e;
+        }
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectAsync
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testQueryStyleJsonSerializationObjectAsync(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): PromiseInterface
+    {
+        return $this->testQueryStyleJsonSerializationObjectAsyncWithHttpInfo($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType)
+            ->then(
+                function ($response) {
+                    return $response[0];
+                }
+            );
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectAsyncWithHttpInfo
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testQueryStyleJsonSerializationObjectAsyncWithHttpInfo(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): PromiseInterface
+    {
+        $returnType = 'string';
+        $request = $this->testQueryStyleJsonSerializationObjectRequest($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+
+        return $this->client
+            ->sendAsync($request, $this->createHttpClientOption())
+            ->then(
+                function ($response) use ($returnType) {
+                    if (in_array($returnType, ['\SplFileObject', '\Psr\Http\Message\StreamInterface'])) {
+                        $content = $response->getBody(); //stream goes to serializer
+                    } else {
+                        $content = (string) $response->getBody();
+                        if ($returnType !== 'string') {
+                            $content = json_decode($content);
+                        }
+                    }
+
+                    return [
+                        ObjectSerializer::deserialize($content, $returnType, []),
+                        $response->getStatusCode(),
+                        $response->getHeaders()
+                    ];
+                },
+                function ($exception) {
+                    $response = $exception->getResponse();
+                    $statusCode = $response->getStatusCode();
+                    throw new ApiException(
+                        sprintf(
+                            '[%d] Error connecting to the API (%s)',
+                            $statusCode,
+                            $exception->getRequest()->getUri()
+                        ),
+                        $statusCode,
+                        $response->getHeaders(),
+                        (string) $response->getBody()
+                    );
+                }
+            );
+    }
+
+    /**
+     * Create request for operation 'testQueryStyleJsonSerializationObject'
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return \GuzzleHttp\Psr7\Request
+     */
+    public function testQueryStyleJsonSerializationObjectRequest(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): Request
+    {
+
+
+
+
+        $resourcePath = '/query/style_jsonSerialization/object';
+        $formParams = [];
+        $queryParams = [];
+        $headerParams = [];
+        $httpBody = '';
+        $multipart = false;
+
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $json_serialized_object_ref_string_query,
+            'json_serialized_object_ref_string_query', // param base name
+            '', // openApiType
+            '', // style
+            false, // explode
+            false // required
+        ) ?? []);
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $json_serialized_object_array_ref_string_query,
+            'json_serialized_object_array_ref_string_query', // param base name
+            '', // openApiType
+            '', // style
+            false, // explode
+            false // required
+        ) ?? []);
+
+
+
+
         $headers = $this->headerSelector->selectHeaders(
             ['text/plain', ],
             $contentType,
diff --git a/samples/client/echo_api/php-nextgen/README.md b/samples/client/echo_api/php-nextgen/README.md
index 6563e0d3df07..00a5d0d0f170 100644
--- a/samples/client/echo_api/php-nextgen/README.md
+++ b/samples/client/echo_api/php-nextgen/README.md
@@ -103,6 +103,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/Api/QueryApi.md#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/Api/QueryApi.md#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/Api/QueryApi.md#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/Api/QueryApi.md#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 ## Models
 
diff --git a/samples/client/echo_api/php-nextgen/docs/Api/QueryApi.md b/samples/client/echo_api/php-nextgen/docs/Api/QueryApi.md
index ae6ca5170395..e6c78ff48794 100644
--- a/samples/client/echo_api/php-nextgen/docs/Api/QueryApi.md
+++ b/samples/client/echo_api/php-nextgen/docs/Api/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to http://localhost:3000, except if the operation defines
 | [**testQueryStyleFormExplodeTrueArrayString()**](QueryApi.md#testQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObject()**](QueryApi.md#testQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**testQueryStyleFormExplodeTrueObjectAllOf()**](QueryApi.md#testQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**testQueryStyleJsonSerializationObject()**](QueryApi.md#testQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 ## `testEnumRefString()`
@@ -585,3 +586,61 @@ No authorization required
 [[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
 [[Back to Model list]](../../README.md#models)
 [[Back to README]](../../README.md)
+
+## `testQueryStyleJsonSerializationObject()`
+
+```php
+testQueryStyleJsonSerializationObject($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query): string
+```
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+
+
+$apiInstance = new OpenAPI\Client\Api\QueryApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client()
+);
+$json_serialized_object_ref_string_query = new \OpenAPI\Client\Model\\OpenAPI\Client\Model\Pet(); // \OpenAPI\Client\Model\Pet
+$json_serialized_object_array_ref_string_query = array(new \OpenAPI\Client\Model\\OpenAPI\Client\Model\Pet()); // \OpenAPI\Client\Model\Pet[]
+
+try {
+    $result = $apiInstance->testQueryStyleJsonSerializationObject($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query);
+    print_r($result);
+} catch (Exception $e) {
+    echo 'Exception when calling QueryApi->testQueryStyleJsonSerializationObject: ', $e->getMessage(), PHP_EOL;
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+| ------------- | ------------- | ------------- | ------------- |
+| **json_serialized_object_ref_string_query** | [**\OpenAPI\Client\Model\Pet**](../Model/.md)|  | [optional] |
+| **json_serialized_object_array_ref_string_query** | [**\OpenAPI\Client\Model\Pet[]**](../Model/\OpenAPI\Client\Model\Pet.md)|  | [optional] |
+
+### Return type
+
+**string**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: `text/plain`
+
+[[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
+[[Back to Model list]](../../README.md#models)
+[[Back to README]](../../README.md)
diff --git a/samples/client/echo_api/php-nextgen/src/Api/QueryApi.php b/samples/client/echo_api/php-nextgen/src/Api/QueryApi.php
index b78226f02a23..4ffdc7d4b998 100644
--- a/samples/client/echo_api/php-nextgen/src/Api/QueryApi.php
+++ b/samples/client/echo_api/php-nextgen/src/Api/QueryApi.php
@@ -105,6 +105,9 @@ class QueryApi
         'testQueryStyleFormExplodeTrueObjectAllOf' => [
             'application/json',
         ],
+        'testQueryStyleJsonSerializationObject' => [
+            'application/json',
+        ],
     ];
 
     /**
@@ -2950,6 +2953,301 @@ public function testQueryStyleFormExplodeTrueObjectAllOfRequest(
 
 
 
+        $headers = $this->headerSelector->selectHeaders(
+            ['text/plain', ],
+            $contentType,
+            $multipart
+        );
+
+        // for model (json/xml)
+        if (count($formParams) > 0) {
+            if ($multipart) {
+                $multipartContents = [];
+                foreach ($formParams as $formParamName => $formParamValue) {
+                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
+                    foreach ($formParamValueItems as $formParamValueItem) {
+                        $multipartContents[] = [
+                            'name' => $formParamName,
+                            'contents' => $formParamValueItem
+                        ];
+                    }
+                }
+                // for HTTP post (form)
+                $httpBody = new MultipartStream($multipartContents);
+
+            } elseif (stripos($headers['Content-Type'], 'application/json') !== false) {
+                # if Content-Type contains "application/json", json_encode the form parameters
+                $httpBody = \GuzzleHttp\Utils::jsonEncode($formParams);
+            } else {
+                // for HTTP post (form)
+                $httpBody = ObjectSerializer::buildQuery($formParams);
+            }
+        }
+
+
+        $defaultHeaders = [];
+        if ($this->config->getUserAgent()) {
+            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
+        }
+
+        $headers = array_merge(
+            $defaultHeaders,
+            $headerParams,
+            $headers
+        );
+
+        $operationHost = $this->config->getHost();
+        $query = ObjectSerializer::buildQuery($queryParams);
+        return new Request(
+            'GET',
+            $operationHost . $resourcePath . ($query ? "?{$query}" : ''),
+            $headers,
+            $httpBody
+        );
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObject
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return string
+     */
+    public function testQueryStyleJsonSerializationObject(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): string
+    {
+        list($response) = $this->testQueryStyleJsonSerializationObjectWithHttpInfo($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+        return $response;
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectWithHttpInfo
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws ApiException on non-2xx response or if the response body is not in the expected format
+     * @throws InvalidArgumentException
+     * @return array of string, HTTP status code, HTTP response headers (array of strings)
+     */
+    public function testQueryStyleJsonSerializationObjectWithHttpInfo(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): array
+    {
+        $request = $this->testQueryStyleJsonSerializationObjectRequest($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+
+        try {
+            $options = $this->createHttpClientOption();
+            try {
+                $response = $this->client->send($request, $options);
+            } catch (RequestException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
+                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
+                );
+            } catch (ConnectException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    null,
+                    null
+                );
+            }
+
+            $statusCode = $response->getStatusCode();
+
+            switch($statusCode) {
+                case 200:
+                    return $this->handleResponseWithDataType(
+                        'string',
+                        $request,
+                        $response,
+                    );
+            }
+            
+
+            if ($statusCode < 200 || $statusCode > 299) {
+                throw new ApiException(
+                    sprintf(
+                        '[%d] Error connecting to the API (%s)',
+                        $statusCode,
+                        (string) $request->getUri()
+                    ),
+                    $statusCode,
+                    $response->getHeaders(),
+                    (string) $response->getBody()
+                );
+            }
+
+            return $this->handleResponseWithDataType(
+                'string',
+                $request,
+                $response,
+            );
+        } catch (ApiException $e) {
+            switch ($e->getCode()) {
+                case 200:
+                    $data = ObjectSerializer::deserialize(
+                        $e->getResponseBody(),
+                        'string',
+                        $e->getResponseHeaders()
+                    );
+                    $e->setResponseObject($data);
+                    throw $e;
+            }
+        
+            throw $e;
+        }
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectAsync
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testQueryStyleJsonSerializationObjectAsync(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): PromiseInterface
+    {
+        return $this->testQueryStyleJsonSerializationObjectAsyncWithHttpInfo($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType)
+            ->then(
+                function ($response) {
+                    return $response[0];
+                }
+            );
+    }
+
+    /**
+     * Operation testQueryStyleJsonSerializationObjectAsyncWithHttpInfo
+     *
+     * Test query parameter(s)
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return PromiseInterface
+     */
+    public function testQueryStyleJsonSerializationObjectAsyncWithHttpInfo(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): PromiseInterface
+    {
+        $returnType = 'string';
+        $request = $this->testQueryStyleJsonSerializationObjectRequest($json_serialized_object_ref_string_query, $json_serialized_object_array_ref_string_query, $contentType);
+
+        return $this->client
+            ->sendAsync($request, $this->createHttpClientOption())
+            ->then(
+                function ($response) use ($returnType) {
+                    if (in_array($returnType, ['\SplFileObject', '\Psr\Http\Message\StreamInterface'])) {
+                        $content = $response->getBody(); //stream goes to serializer
+                    } else {
+                        $content = (string) $response->getBody();
+                        if ($returnType !== 'string') {
+                            $content = json_decode($content);
+                        }
+                    }
+
+                    return [
+                        ObjectSerializer::deserialize($content, $returnType, []),
+                        $response->getStatusCode(),
+                        $response->getHeaders()
+                    ];
+                },
+                function ($exception) {
+                    $response = $exception->getResponse();
+                    $statusCode = $response->getStatusCode();
+                    throw new ApiException(
+                        sprintf(
+                            '[%d] Error connecting to the API (%s)',
+                            $statusCode,
+                            $exception->getRequest()->getUri()
+                        ),
+                        $statusCode,
+                        $response->getHeaders(),
+                        (string) $response->getBody()
+                    );
+                }
+            );
+    }
+
+    /**
+     * Create request for operation 'testQueryStyleJsonSerializationObject'
+     *
+     * @param  \OpenAPI\Client\Model\Pet|null $json_serialized_object_ref_string_query (optional)
+     * @param  \OpenAPI\Client\Model\Pet[]|null $json_serialized_object_array_ref_string_query (optional)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['testQueryStyleJsonSerializationObject'] to see the possible values for this operation
+     *
+     * @throws InvalidArgumentException
+     * @return \GuzzleHttp\Psr7\Request
+     */
+    public function testQueryStyleJsonSerializationObjectRequest(
+        ?\OpenAPI\Client\Model\Pet $json_serialized_object_ref_string_query = null,
+        ?array $json_serialized_object_array_ref_string_query = null,
+        string $contentType = self::contentTypes['testQueryStyleJsonSerializationObject'][0]
+    ): Request
+    {
+
+
+
+
+        $resourcePath = '/query/style_jsonSerialization/object';
+        $formParams = [];
+        $queryParams = [];
+        $headerParams = [];
+        $httpBody = '';
+        $multipart = false;
+
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $json_serialized_object_ref_string_query,
+            'json_serialized_object_ref_string_query', // param base name
+            '', // openApiType
+            '', // style
+            false, // explode
+            false // required
+        ) ?? []);
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $json_serialized_object_array_ref_string_query,
+            'json_serialized_object_array_ref_string_query', // param base name
+            '', // openApiType
+            '', // style
+            false, // explode
+            false // required
+        ) ?? []);
+
+
+
+
         $headers = $this->headerSelector->selectHeaders(
             ['text/plain', ],
             $contentType,
diff --git a/samples/client/echo_api/powershell/README.md b/samples/client/echo_api/powershell/README.md
index 1d6170d38017..916a29fbfc11 100644
--- a/samples/client/echo_api/powershell/README.md
+++ b/samples/client/echo_api/powershell/README.md
@@ -79,6 +79,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**Test-QueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#Test-QueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**Test-QueryStyleFormExplodeTrueObject**](docs/QueryApi.md#Test-QueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**Test-QueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#Test-QueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**Test-QueryStyleJsonSerializationObject**](docs/QueryApi.md#Test-QueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/powershell/docs/QueryApi.md b/samples/client/echo_api/powershell/docs/QueryApi.md
index 84f7bfcf1fca..7d04d7ece209 100644
--- a/samples/client/echo_api/powershell/docs/QueryApi.md
+++ b/samples/client/echo_api/powershell/docs/QueryApi.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**Test-QueryStyleFormExplodeTrueArrayString**](QueryApi.md#Test-QueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**Test-QueryStyleFormExplodeTrueObject**](QueryApi.md#Test-QueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 [**Test-QueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#Test-QueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**Test-QueryStyleJsonSerializationObject**](QueryApi.md#Test-QueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 <a id="Test-EnumRefString"></a>
@@ -465,3 +466,51 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+<a id="Test-QueryStyleJsonSerializationObject"></a>
+# **Test-QueryStyleJsonSerializationObject**
+> String Test-QueryStyleJsonSerializationObject<br>
+> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[-JsonSerializedObjectRefStringQuery] <PSCustomObject><br>
+> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[-JsonSerializedObjectArrayRefStringQuery] <PSCustomObject[]><br>
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+```powershell
+$Category = Initialize-Category -Id 1 -Name "Dogs"
+$Tag = Initialize-Tag -Id 0 -Name "MyName"
+$Pet = Initialize-Pet -Id 10 -Name "doggie" -Category $Category -PhotoUrls "MyPhotoUrls" -Tags $Tag -Status "available" # Pet |  (optional)
+ # Pet[] |  (optional)
+
+# Test query parameter(s)
+try {
+    $Result = Test-QueryStyleJsonSerializationObject -JsonSerializedObjectRefStringQuery $JsonSerializedObjectRefStringQuery -JsonSerializedObjectArrayRefStringQuery $JsonSerializedObjectArrayRefStringQuery
+} catch {
+    Write-Host ("Exception occurred when calling Test-QueryStyleJsonSerializationObject: {0}" -f ($_.ErrorDetails | ConvertFrom-Json))
+    Write-Host ("Response headers: {0}" -f ($_.Exception.Response.Headers | ConvertTo-Json))
+}
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **JsonSerializedObjectRefStringQuery** | [**Pet**](Pet.md)|  | [optional] 
+ **JsonSerializedObjectArrayRefStringQuery** | [**Pet[]**](Pet.md)|  | [optional] 
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/QueryApi.ps1 b/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/QueryApi.ps1
index 91d20187ea70..2495ffc50b49 100644
--- a/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/QueryApi.ps1
+++ b/samples/client/echo_api/powershell/src/PSOpenAPITools/Api/QueryApi.ps1
@@ -787,3 +787,86 @@ function Test-QueryStyleFormExplodeTrueObjectAllOf {
     }
 }
 
+<#
+.SYNOPSIS
+
+Test query parameter(s)
+
+.DESCRIPTION
+
+No description available.
+
+.PARAMETER JsonSerializedObjectRefStringQuery
+No description available.
+
+.PARAMETER JsonSerializedObjectArrayRefStringQuery
+No description available.
+
+.PARAMETER WithHttpInfo
+
+A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
+
+.OUTPUTS
+
+String
+#>
+function Test-QueryStyleJsonSerializationObject {
+    [CmdletBinding()]
+    Param (
+        [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
+        [PSCustomObject]
+        ${JsonSerializedObjectRefStringQuery},
+        [Parameter(Position = 1, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
+        [PSCustomObject[]]
+        ${JsonSerializedObjectArrayRefStringQuery},
+        [Switch]
+        $WithHttpInfo
+    )
+
+    Process {
+        'Calling method: Test-QueryStyleJsonSerializationObject' | Write-Debug
+        $PSBoundParameters | Out-DebugParameter | Write-Debug
+
+        $LocalVarAccepts = @()
+        $LocalVarContentTypes = @()
+        $LocalVarQueryParameters = @{}
+        $LocalVarHeaderParameters = @{}
+        $LocalVarFormParameters = @{}
+        $LocalVarPathParameters = @{}
+        $LocalVarCookieParameters = @{}
+        $LocalVarBodyParameter = $null
+
+        $Configuration = Get-Configuration
+        # HTTP header 'Accept' (if needed)
+        $LocalVarAccepts = @('text/plain')
+
+        $LocalVarUri = '/query/style_jsonSerialization/object'
+
+        if ($JsonSerializedObjectRefStringQuery) {
+            $LocalVarQueryParameters['json_serialized_object_ref_string_query'] = $JsonSerializedObjectRefStringQuery
+        }
+
+        if ($JsonSerializedObjectArrayRefStringQuery) {
+            $LocalVarQueryParameters['json_serialized_object_array_ref_string_query'] = $JsonSerializedObjectArrayRefStringQuery
+        }
+
+        $LocalVarResult = Invoke-ApiClient -Method 'GET' `
+                                -Uri $LocalVarUri `
+                                -Accepts $LocalVarAccepts `
+                                -ContentTypes $LocalVarContentTypes `
+                                -Body $LocalVarBodyParameter `
+                                -HeaderParameters $LocalVarHeaderParameters `
+                                -QueryParameters $LocalVarQueryParameters `
+                                -FormParameters $LocalVarFormParameters `
+                                -CookieParameters $LocalVarCookieParameters `
+                                -ReturnType "String" `
+                                -IsBodyNullable $false
+
+        if ($WithHttpInfo.IsPresent) {
+            return $LocalVarResult
+        } else {
+            return $LocalVarResult["Response"]
+        }
+    }
+}
+
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
index 783da5efb657..a893498b9cb6 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/README.md
@@ -121,6 +121,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation For Models
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/QueryApi.md b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/QueryApi.md
index 8c8bf981a5f7..dc1a241c15c2 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/QueryApi.md
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/QueryApi.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 # **test_enum_ref_string**
@@ -700,3 +701,73 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_query_style_json_serialization_object**
+> str test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+
+```python
+import openapi_client
+from openapi_client.models.pet import Pet
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.QueryApi(api_client)
+    json_serialized_object_ref_string_query = openapi_client.Pet() # Pet |  (optional)
+    json_serialized_object_array_ref_string_query = [openapi_client.Pet()] # List[Pet] |  (optional)
+
+    try:
+        # Test query parameter(s)
+        api_response = api_instance.test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+        print("The response of QueryApi->test_query_style_json_serialization_object:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling QueryApi->test_query_style_json_serialization_object: %s\n" % e)
+```
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **json_serialized_object_ref_string_query** | [**Pet**](.md)|  | [optional] 
+ **json_serialized_object_array_ref_string_query** | [**List[Pet]**](Pet.md)|  | [optional] 
+
+### Return type
+
+**str**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/query_api.py b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/query_api.py
index 7d2ecbb1c2ca..44955f205678 100644
--- a/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/query_api.py
+++ b/samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/openapi_client/api/query_api.py
@@ -2765,3 +2765,283 @@ def _test_query_style_form_explode_true_object_all_of_serialize(
         )
 
 
+
+
+    @validate_call
+    def test_query_style_json_serialization_object(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> str:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        ).data
+
+
+    @validate_call
+    def test_query_style_json_serialization_object_with_http_info(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ApiResponse[str]:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        )
+
+
+    @validate_call
+    def test_query_style_json_serialization_object_without_preload_content(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> RESTResponseType:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        return response_data.response
+
+
+    def _test_query_style_json_serialization_object_serialize(
+        self,
+        json_serialized_object_ref_string_query,
+        json_serialized_object_array_ref_string_query,
+        _request_auth,
+        _content_type,
+        _headers,
+        _host_index,
+    ) -> RequestSerialized:
+
+        _host = None
+
+        _collection_formats: Dict[str, str] = {
+            'json_serialized_object_array_ref_string_query': 'csv',
+        }
+
+        _path_params: Dict[str, str] = {}
+        _query_params: List[Tuple[str, str]] = []
+        _header_params: Dict[str, Optional[str]] = _headers or {}
+        _form_params: List[Tuple[str, str]] = []
+        _files: Dict[
+            str, Union[str, bytes, List[str], List[bytes], List[Tuple[str, bytes]]]
+        ] = {}
+        _body_params: Optional[bytes] = None
+
+        # process the path parameters
+        # process the query parameters
+        if json_serialized_object_ref_string_query is not None:
+            
+            _query_params.append(('json_serialized_object_ref_string_query', json_serialized_object_ref_string_query))
+            
+        if json_serialized_object_array_ref_string_query is not None:
+            
+            _query_params.append(('json_serialized_object_array_ref_string_query', json_serialized_object_array_ref_string_query))
+            
+        # process the header parameters
+        # process the form parameters
+        # process the body parameter
+
+
+        # set the HTTP header `Accept`
+        if 'Accept' not in _header_params:
+            _header_params['Accept'] = self.api_client.select_header_accept(
+                [
+                    'text/plain'
+                ]
+            )
+
+
+        # authentication setting
+        _auth_settings: List[str] = [
+        ]
+
+        return self.api_client.param_serialize(
+            method='GET',
+            resource_path='/query/style_jsonSerialization/object',
+            path_params=_path_params,
+            query_params=_query_params,
+            header_params=_header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            auth_settings=_auth_settings,
+            collection_formats=_collection_formats,
+            _host=_host,
+            _request_auth=_request_auth
+        )
+
+
diff --git a/samples/client/echo_api/python-pydantic-v1/README.md b/samples/client/echo_api/python-pydantic-v1/README.md
index 51d0a302f820..9b7d6bd64b8b 100644
--- a/samples/client/echo_api/python-pydantic-v1/README.md
+++ b/samples/client/echo_api/python-pydantic-v1/README.md
@@ -122,6 +122,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation For Models
diff --git a/samples/client/echo_api/python-pydantic-v1/docs/QueryApi.md b/samples/client/echo_api/python-pydantic-v1/docs/QueryApi.md
index 5d56e95efc23..88a27b10186a 100644
--- a/samples/client/echo_api/python-pydantic-v1/docs/QueryApi.md
+++ b/samples/client/echo_api/python-pydantic-v1/docs/QueryApi.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 # **test_enum_ref_string**
@@ -690,3 +691,72 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_query_style_json_serialization_object**
+> str test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+```python
+import time
+import os
+import openapi_client
+from openapi_client.models.pet import Pet
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.QueryApi(api_client)
+    json_serialized_object_ref_string_query = openapi_client.Pet() # Pet |  (optional)
+    json_serialized_object_array_ref_string_query = [openapi_client.Pet()] # List[Pet] |  (optional)
+
+    try:
+        # Test query parameter(s)
+        api_response = api_instance.test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+        print("The response of QueryApi->test_query_style_json_serialization_object:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling QueryApi->test_query_style_json_serialization_object: %s\n" % e)
+```
+
+
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **json_serialized_object_ref_string_query** | [**Pet**](.md)|  | [optional] 
+ **json_serialized_object_array_ref_string_query** | [**List[Pet]**](Pet.md)|  | [optional] 
+
+### Return type
+
+**str**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/python-pydantic-v1/openapi_client/api/query_api.py b/samples/client/echo_api/python-pydantic-v1/openapi_client/api/query_api.py
index 680dbd3fba51..e6b9a6e20337 100644
--- a/samples/client/echo_api/python-pydantic-v1/openapi_client/api/query_api.py
+++ b/samples/client/echo_api/python-pydantic-v1/openapi_client/api/query_api.py
@@ -1496,3 +1496,152 @@ def test_query_style_form_explode_true_object_all_of_with_http_info(self, query_
             _request_timeout=_params.get('_request_timeout'),
             collection_formats=_collection_formats,
             _request_auth=_params.get('_request_auth'))
+
+    @validate_arguments
+    def test_query_style_json_serialization_object(self, json_serialized_object_ref_string_query : Optional[Pet] = None, json_serialized_object_array_ref_string_query : Optional[conlist(Pet)] = None, **kwargs) -> str:  # noqa: E501
+        """Test query parameter(s)  # noqa: E501
+
+        Test query parameter(s)  # noqa: E501
+        This method makes a synchronous HTTP request by default. To make an
+        asynchronous HTTP request, please pass async_req=True
+
+        >>> thread = api.test_query_style_json_serialization_object(json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query, async_req=True)
+        >>> result = thread.get()
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _request_timeout: timeout setting for this request.
+               If one number provided, it will be total request
+               timeout. It can also be a pair (tuple) of
+               (connection, read) timeouts.
+        :return: Returns the result object.
+                 If the method is called asynchronously,
+                 returns the request thread.
+        :rtype: str
+        """
+        kwargs['_return_http_data_only'] = True
+        if '_preload_content' in kwargs:
+            message = "Error! Please call the test_query_style_json_serialization_object_with_http_info method with `_preload_content` instead and obtain raw data from ApiResponse.raw_data"  # noqa: E501
+            raise ValueError(message)
+        return self.test_query_style_json_serialization_object_with_http_info(json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query, **kwargs)  # noqa: E501
+
+    @validate_arguments
+    def test_query_style_json_serialization_object_with_http_info(self, json_serialized_object_ref_string_query : Optional[Pet] = None, json_serialized_object_array_ref_string_query : Optional[conlist(Pet)] = None, **kwargs) -> ApiResponse:  # noqa: E501
+        """Test query parameter(s)  # noqa: E501
+
+        Test query parameter(s)  # noqa: E501
+        This method makes a synchronous HTTP request by default. To make an
+        asynchronous HTTP request, please pass async_req=True
+
+        >>> thread = api.test_query_style_json_serialization_object_with_http_info(json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query, async_req=True)
+        >>> result = thread.get()
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param async_req: Whether to execute the request asynchronously.
+        :type async_req: bool, optional
+        :param _preload_content: if False, the ApiResponse.data will
+                                 be set to none and raw_data will store the
+                                 HTTP response body without reading/decoding.
+                                 Default is True.
+        :type _preload_content: bool, optional
+        :param _return_http_data_only: response data instead of ApiResponse
+                                       object with status code, headers, etc
+        :type _return_http_data_only: bool, optional
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
+        :type _content_type: string, optional: force content-type for the request
+        :return: Returns the result object.
+                 If the method is called asynchronously,
+                 returns the request thread.
+        :rtype: tuple(str, status_code(int), headers(HTTPHeaderDict))
+        """
+
+        _params = locals()
+
+        _all_params = [
+            'json_serialized_object_ref_string_query',
+            'json_serialized_object_array_ref_string_query'
+        ]
+        _all_params.extend(
+            [
+                'async_req',
+                '_return_http_data_only',
+                '_preload_content',
+                '_request_timeout',
+                '_request_auth',
+                '_content_type',
+                '_headers'
+            ]
+        )
+
+        # validate the arguments
+        for _key, _val in _params['kwargs'].items():
+            if _key not in _all_params:
+                raise ApiTypeError(
+                    "Got an unexpected keyword argument '%s'"
+                    " to method test_query_style_json_serialization_object" % _key
+                )
+            _params[_key] = _val
+        del _params['kwargs']
+
+        _collection_formats = {}
+
+        # process the path parameters
+        _path_params = {}
+
+        # process the query parameters
+        _query_params = []
+        if _params.get('json_serialized_object_ref_string_query') is not None:  # noqa: E501
+            _query_params.append(('json_serialized_object_ref_string_query', _params['json_serialized_object_ref_string_query']))
+
+        if _params.get('json_serialized_object_array_ref_string_query') is not None:  # noqa: E501
+            _query_params.append(('json_serialized_object_array_ref_string_query', _params['json_serialized_object_array_ref_string_query']))
+            _collection_formats['json_serialized_object_array_ref_string_query'] = 'csv'
+
+        # process the header parameters
+        _header_params = dict(_params.get('_headers', {}))
+        # process the form parameters
+        _form_params = []
+        _files = {}
+        # process the body parameter
+        _body_params = None
+        # set the HTTP header `Accept`
+        _header_params['Accept'] = self.api_client.select_header_accept(
+            ['text/plain'])  # noqa: E501
+
+        # authentication setting
+        _auth_settings = []  # noqa: E501
+
+        _response_types_map = {
+            '200': "str",
+        }
+
+        return self.api_client.call_api(
+            '/query/style_jsonSerialization/object', 'GET',
+            _path_params,
+            _query_params,
+            _header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            response_types_map=_response_types_map,
+            auth_settings=_auth_settings,
+            async_req=_params.get('async_req'),
+            _return_http_data_only=_params.get('_return_http_data_only'),  # noqa: E501
+            _preload_content=_params.get('_preload_content', True),
+            _request_timeout=_params.get('_request_timeout'),
+            collection_formats=_collection_formats,
+            _request_auth=_params.get('_request_auth'))
diff --git a/samples/client/echo_api/python/README.md b/samples/client/echo_api/python/README.md
index 783da5efb657..a893498b9cb6 100644
--- a/samples/client/echo_api/python/README.md
+++ b/samples/client/echo_api/python/README.md
@@ -121,6 +121,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation For Models
diff --git a/samples/client/echo_api/python/docs/QueryApi.md b/samples/client/echo_api/python/docs/QueryApi.md
index 8c8bf981a5f7..dc1a241c15c2 100644
--- a/samples/client/echo_api/python/docs/QueryApi.md
+++ b/samples/client/echo_api/python/docs/QueryApi.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 # **test_enum_ref_string**
@@ -700,3 +701,73 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **test_query_style_json_serialization_object**
+> str test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+
+
+```python
+import openapi_client
+from openapi_client.models.pet import Pet
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.QueryApi(api_client)
+    json_serialized_object_ref_string_query = openapi_client.Pet() # Pet |  (optional)
+    json_serialized_object_array_ref_string_query = [openapi_client.Pet()] # List[Pet] |  (optional)
+
+    try:
+        # Test query parameter(s)
+        api_response = api_instance.test_query_style_json_serialization_object(json_serialized_object_ref_string_query=json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query)
+        print("The response of QueryApi->test_query_style_json_serialization_object:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling QueryApi->test_query_style_json_serialization_object: %s\n" % e)
+```
+
+
+
+### Parameters
+
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **json_serialized_object_ref_string_query** | [**Pet**](.md)|  | [optional] 
+ **json_serialized_object_array_ref_string_query** | [**List[Pet]**](Pet.md)|  | [optional] 
+
+### Return type
+
+**str**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/client/echo_api/python/openapi_client/api/query_api.py b/samples/client/echo_api/python/openapi_client/api/query_api.py
index 7d2ecbb1c2ca..44955f205678 100644
--- a/samples/client/echo_api/python/openapi_client/api/query_api.py
+++ b/samples/client/echo_api/python/openapi_client/api/query_api.py
@@ -2765,3 +2765,283 @@ def _test_query_style_form_explode_true_object_all_of_serialize(
         )
 
 
+
+
+    @validate_call
+    def test_query_style_json_serialization_object(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> str:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        ).data
+
+
+    @validate_call
+    def test_query_style_json_serialization_object_with_http_info(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ApiResponse[str]:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        )
+
+
+    @validate_call
+    def test_query_style_json_serialization_object_without_preload_content(
+        self,
+        json_serialized_object_ref_string_query: Optional[Pet] = None,
+        json_serialized_object_array_ref_string_query: Optional[List[Pet]] = None,
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[
+                Annotated[StrictFloat, Field(gt=0)],
+                Annotated[StrictFloat, Field(gt=0)]
+            ]
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> RESTResponseType:
+        """Test query parameter(s)
+
+        Test query parameter(s)
+
+        :param json_serialized_object_ref_string_query:
+        :type json_serialized_object_ref_string_query: Pet
+        :param json_serialized_object_array_ref_string_query:
+        :type json_serialized_object_array_ref_string_query: List[Pet]
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """ # noqa: E501
+
+        _param = self._test_query_style_json_serialization_object_serialize(
+            json_serialized_object_ref_string_query=json_serialized_object_ref_string_query,
+            json_serialized_object_array_ref_string_query=json_serialized_object_array_ref_string_query,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            '200': "str",
+        }
+        response_data = self.api_client.call_api(
+            *_param,
+            _request_timeout=_request_timeout
+        )
+        return response_data.response
+
+
+    def _test_query_style_json_serialization_object_serialize(
+        self,
+        json_serialized_object_ref_string_query,
+        json_serialized_object_array_ref_string_query,
+        _request_auth,
+        _content_type,
+        _headers,
+        _host_index,
+    ) -> RequestSerialized:
+
+        _host = None
+
+        _collection_formats: Dict[str, str] = {
+            'json_serialized_object_array_ref_string_query': 'csv',
+        }
+
+        _path_params: Dict[str, str] = {}
+        _query_params: List[Tuple[str, str]] = []
+        _header_params: Dict[str, Optional[str]] = _headers or {}
+        _form_params: List[Tuple[str, str]] = []
+        _files: Dict[
+            str, Union[str, bytes, List[str], List[bytes], List[Tuple[str, bytes]]]
+        ] = {}
+        _body_params: Optional[bytes] = None
+
+        # process the path parameters
+        # process the query parameters
+        if json_serialized_object_ref_string_query is not None:
+            
+            _query_params.append(('json_serialized_object_ref_string_query', json_serialized_object_ref_string_query))
+            
+        if json_serialized_object_array_ref_string_query is not None:
+            
+            _query_params.append(('json_serialized_object_array_ref_string_query', json_serialized_object_array_ref_string_query))
+            
+        # process the header parameters
+        # process the form parameters
+        # process the body parameter
+
+
+        # set the HTTP header `Accept`
+        if 'Accept' not in _header_params:
+            _header_params['Accept'] = self.api_client.select_header_accept(
+                [
+                    'text/plain'
+                ]
+            )
+
+
+        # authentication setting
+        _auth_settings: List[str] = [
+        ]
+
+        return self.api_client.param_serialize(
+            method='GET',
+            resource_path='/query/style_jsonSerialization/object',
+            path_params=_path_params,
+            query_params=_query_params,
+            header_params=_header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            auth_settings=_auth_settings,
+            collection_formats=_collection_formats,
+            _host=_host,
+            _request_auth=_request_auth
+        )
+
+
diff --git a/samples/client/echo_api/r/R/query_api.R b/samples/client/echo_api/r/R/query_api.R
index b237286bdfaa..7afbf45a2908 100644
--- a/samples/client/echo_api/r/R/query_api.R
+++ b/samples/client/echo_api/r/R/query_api.R
@@ -159,6 +159,21 @@
 #' dput(result)
 #'
 #'
+#' ####################  TestQueryStyleJsonSerializationObject  ####################
+#'
+#' library(openapi)
+#' var_json_serialized_object_ref_string_query <- Pet$new("name_example", c("photoUrls_example"), 123, Category$new(123, "name_example"), c(Tag$new(123, "name_example")), "available") # Pet |  (Optional)
+#' var_json_serialized_object_array_ref_string_query <- c(Pet$new("name_example", c("photoUrls_example"), 123, Category$new(123, "name_example"), c(Tag$new(123, "name_example")), "available")) # array[Pet] |  (Optional)
+#'
+#' #Test query parameter(s)
+#' api_instance <- QueryApi$new()
+#'
+#' # to save the result into a file, simply add the optional `data_file` parameter, e.g.
+#' # result <- api_instance$TestQueryStyleJsonSerializationObject(json_serialized_object_ref_string_query = var_json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query = var_json_serialized_object_array_ref_string_querydata_file = "result.txt")
+#' result <- api_instance$TestQueryStyleJsonSerializationObject(json_serialized_object_ref_string_query = var_json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query = var_json_serialized_object_array_ref_string_query)
+#' dput(result)
+#'
+#'
 #' }
 #' @importFrom R6 R6Class
 #' @importFrom base64enc base64encode
@@ -1162,6 +1177,110 @@ QueryApi <- R6::R6Class(
         return(local_var_resp)
       } 
       
+      local_var_error_msg <- local_var_resp$response_as_text()      
+      if (local_var_resp$status_code >= 300 && local_var_resp$status_code <= 399) {
+        ApiResponse$new(paste("Server returned ", local_var_resp$status_code, " response status code."), local_var_resp)
+      } else if (local_var_resp$status_code >= 400 && local_var_resp$status_code <= 499) {
+        ApiResponse$new("API client error", local_var_resp)
+      } else if (local_var_resp$status_code >= 500 && local_var_resp$status_code <= 599) {
+        if (is.null(local_var_resp$response) || local_var_resp$response == "") {
+          local_var_resp$response <- "API server error"
+        }
+        return(local_var_resp)
+      }
+    },
+
+    #' @description
+    #' Test query parameter(s)
+    #'
+    #' @param json_serialized_object_ref_string_query (optional) No description
+    #' @param json_serialized_object_array_ref_string_query (optional) No description
+    #' @param data_file (optional) name of the data file to save the result
+    #' @param ... Other optional arguments
+    #'
+    #' @return character
+    TestQueryStyleJsonSerializationObject = function(json_serialized_object_ref_string_query = NULL, json_serialized_object_array_ref_string_query = NULL, data_file = NULL, ...) {
+      local_var_response <- self$TestQueryStyleJsonSerializationObjectWithHttpInfo(json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query, data_file = data_file, ...)
+      if (local_var_response$status_code >= 200 && local_var_response$status_code <= 299) {
+        return(local_var_response$content)
+      } else if (local_var_response$status_code >= 300 && local_var_response$status_code <= 399) {
+        return(local_var_response)
+      } else if (local_var_response$status_code >= 400 && local_var_response$status_code <= 499) {
+        return(local_var_response)
+      } else if (local_var_response$status_code >= 500 && local_var_response$status_code <= 599) {
+        return(local_var_response)
+      }
+    },
+
+    #' @description
+    #' Test query parameter(s)
+    #'
+    #' @param json_serialized_object_ref_string_query (optional) No description
+    #' @param json_serialized_object_array_ref_string_query (optional) No description
+    #' @param data_file (optional) name of the data file to save the result
+    #' @param ... Other optional arguments
+    #'
+    #' @return API response (character) with additional information such as HTTP status code, headers
+    TestQueryStyleJsonSerializationObjectWithHttpInfo = function(json_serialized_object_ref_string_query = NULL, json_serialized_object_array_ref_string_query = NULL, data_file = NULL, ...) {
+      args <- list(...)
+      query_params <- list()
+      header_params <- c()
+      form_params <- list()
+      file_params <- list()
+      local_var_body <- NULL
+      oauth_scopes <- NULL
+      is_oauth <- FALSE
+
+      if (!missing(`json_serialized_object_ref_string_query`) && is.null(`json_serialized_object_ref_string_query`)) {
+        stop("Invalid value for `json_serialized_object_ref_string_query` when calling QueryApi$TestQueryStyleJsonSerializationObject, `json_serialized_object_ref_string_query` is not nullable")
+      }
+
+      if (!missing(`json_serialized_object_array_ref_string_query`) && is.null(`json_serialized_object_array_ref_string_query`)) {
+        stop("Invalid value for `json_serialized_object_array_ref_string_query` when calling QueryApi$TestQueryStyleJsonSerializationObject, `json_serialized_object_array_ref_string_query` is not nullable")
+      }
+
+      query_params[["json_serialized_object_ref_string_query"]] <- `json_serialized_object_ref_string_query`
+
+      # no explore
+      query_params[["json_serialized_object_array_ref_string_query"]] <- I(paste(lapply(`json_serialized_object_array_ref_string_query`, URLencode, reserved = TRUE), collapse = ","))
+
+      local_var_url_path <- "/query/style_jsonSerialization/object"
+
+      # The Accept request HTTP header
+      local_var_accepts <- list("text/plain")
+
+      # The Content-Type representation header
+      local_var_content_types <- list()
+
+      local_var_resp <- self$api_client$CallApi(url = paste0(self$api_client$base_path, local_var_url_path),
+                                 method = "GET",
+                                 query_params = query_params,
+                                 header_params = header_params,
+                                 form_params = form_params,
+                                 file_params = file_params,
+                                 accepts = local_var_accepts,
+                                 content_types = local_var_content_types,
+                                 body = local_var_body,
+                                 is_oauth = is_oauth,
+                                 oauth_scopes = oauth_scopes,
+                                 ...)
+
+      if (local_var_resp$status_code >= 200 && local_var_resp$status_code <= 299) {
+        # save response in a file
+        if (!is.null(data_file)) {
+          self$api_client$WriteFile(local_var_resp, data_file)
+        }
+
+        deserialized_resp_obj <- tryCatch(
+          self$api_client$DeserializeResponse(local_var_resp, "character"),
+          error = function(e) {
+            stop("Failed to deserialize response")
+          }
+        )
+        local_var_resp$content <- deserialized_resp_obj
+        return(local_var_resp)
+      } 
+      
       local_var_error_msg <- local_var_resp$response_as_text()      
       if (local_var_resp$status_code >= 300 && local_var_resp$status_code <= 399) {
         ApiResponse$new(paste("Server returned ", local_var_resp$status_code, " response status code."), local_var_resp)
diff --git a/samples/client/echo_api/r/README.md b/samples/client/echo_api/r/README.md
index 9e44c76894d6..cee04725f5da 100644
--- a/samples/client/echo_api/r/README.md
+++ b/samples/client/echo_api/r/README.md
@@ -100,6 +100,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**TestQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#TestQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**TestQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#TestQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**TestQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#TestQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**TestQueryStyleJsonSerializationObject**](docs/QueryApi.md#TestQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/r/docs/QueryApi.md b/samples/client/echo_api/r/docs/QueryApi.md
index 1c9807fa862f..ae3aea47e2ea 100644
--- a/samples/client/echo_api/r/docs/QueryApi.md
+++ b/samples/client/echo_api/r/docs/QueryApi.md
@@ -14,6 +14,7 @@ Method | HTTP request | Description
 [**TestQueryStyleFormExplodeTrueArrayString**](QueryApi.md#TestQueryStyleFormExplodeTrueArrayString) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 [**TestQueryStyleFormExplodeTrueObject**](QueryApi.md#TestQueryStyleFormExplodeTrueObject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 [**TestQueryStyleFormExplodeTrueObjectAllOf**](QueryApi.md#TestQueryStyleFormExplodeTrueObjectAllOf) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+[**TestQueryStyleJsonSerializationObject**](QueryApi.md#TestQueryStyleJsonSerializationObject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 # **TestEnumRefString**
@@ -496,3 +497,52 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+# **TestQueryStyleJsonSerializationObject**
+> character TestQueryStyleJsonSerializationObject(json_serialized_object_ref_string_query = var.json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query = var.json_serialized_object_array_ref_string_query)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Example
+```R
+library(openapi)
+
+# Test query parameter(s)
+#
+# prepare function argument(s)
+var_json_serialized_object_ref_string_query <- Pet$new("name_example", c("photoUrls_example"), 123, Category$new(123, "name_example"), c(Tag$new(123, "name_example")), "available") # Pet |  (Optional)
+var_json_serialized_object_array_ref_string_query <- c(Pet$new("name_example", c("photoUrls_example"), 123, Category$new(123, "name_example"), c(Tag$new(123, "name_example")), "available")) # array[Pet] |  (Optional)
+
+api_instance <- QueryApi$new()
+# to save the result into a file, simply add the optional `data_file` parameter, e.g.
+# result <- api_instance$TestQueryStyleJsonSerializationObject(json_serialized_object_ref_string_query = var_json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query = var_json_serialized_object_array_ref_string_querydata_file = "result.txt")
+result <- api_instance$TestQueryStyleJsonSerializationObject(json_serialized_object_ref_string_query = var_json_serialized_object_ref_string_query, json_serialized_object_array_ref_string_query = var_json_serialized_object_array_ref_string_query)
+dput(result)
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **json_serialized_object_ref_string_query** | [**Pet**](.md)|  | [optional] 
+ **json_serialized_object_array_ref_string_query** | list( [**Pet**](Pet.md) )|  | [optional] 
+
+### Return type
+
+**character**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
diff --git a/samples/client/echo_api/ruby-faraday/README.md b/samples/client/echo_api/ruby-faraday/README.md
index 20469aca1460..0e49a9db1a43 100644
--- a/samples/client/echo_api/ruby-faraday/README.md
+++ b/samples/client/echo_api/ruby-faraday/README.md
@@ -111,6 +111,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*OpenapiClient::QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/ruby-faraday/docs/QueryApi.md b/samples/client/echo_api/ruby-faraday/docs/QueryApi.md
index 128b8cdc4b91..01de891f3188 100644
--- a/samples/client/echo_api/ruby-faraday/docs/QueryApi.md
+++ b/samples/client/echo_api/ruby-faraday/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 ## test_enum_ref_string
@@ -685,3 +686,71 @@ No authorization required
 - **Content-Type**: Not defined
 - **Accept**: text/plain
 
+
+## test_query_style_json_serialization_object
+
+> String test_query_style_json_serialization_object(opts)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::QueryApi.new
+opts = {
+  json_serialized_object_ref_string_query: OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']}), # Pet | 
+  json_serialized_object_array_ref_string_query: [OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']})] # Array<Pet> | 
+}
+
+begin
+  # Test query parameter(s)
+  result = api_instance.test_query_style_json_serialization_object(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object: #{e}"
+end
+```
+
+#### Using the test_query_style_json_serialization_object_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(String, Integer, Hash)> test_query_style_json_serialization_object_with_http_info(opts)
+
+```ruby
+begin
+  # Test query parameter(s)
+  data, status_code, headers = api_instance.test_query_style_json_serialization_object_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => String
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **json_serialized_object_ref_string_query** | [**Pet**](.md) |  | [optional] |
+| **json_serialized_object_array_ref_string_query** | [**Array&lt;Pet&gt;**](Pet.md) |  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
diff --git a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/query_api.rb b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/query_api.rb
index f70d50c7398b..3100e3f68377 100644
--- a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/query_api.rb
+++ b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api/query_api.rb
@@ -637,5 +637,68 @@ def test_query_style_form_explode_true_object_all_of_with_http_info(opts = {})
       end
       return data, status_code, headers
     end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [String]
+    def test_query_style_json_serialization_object(opts = {})
+      data, _status_code, _headers = test_query_style_json_serialization_object_with_http_info(opts)
+      data
+    end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [Array<(String, Integer, Hash)>] String data, response status code and response headers
+    def test_query_style_json_serialization_object_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: QueryApi.test_query_style_json_serialization_object ...'
+      end
+      # resource path
+      local_var_path = '/query/style_jsonSerialization/object'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+      query_params[:'json_serialized_object_ref_string_query'] = opts[:'json_serialized_object_ref_string_query'] if !opts[:'json_serialized_object_ref_string_query'].nil?
+      query_params[:'json_serialized_object_array_ref_string_query'] = @api_client.build_collection_param(opts[:'json_serialized_object_array_ref_string_query'], :csv) if !opts[:'json_serialized_object_array_ref_string_query'].nil?
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['text/plain']) unless header_params['Accept']
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body]
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'String'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"QueryApi.test_query_style_json_serialization_object",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:GET, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: QueryApi#test_query_style_json_serialization_object\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
   end
 end
diff --git a/samples/client/echo_api/ruby-httpx/README.md b/samples/client/echo_api/ruby-httpx/README.md
index a40983a90910..e2b39c82fb29 100644
--- a/samples/client/echo_api/ruby-httpx/README.md
+++ b/samples/client/echo_api/ruby-httpx/README.md
@@ -111,6 +111,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*OpenapiClient::QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/ruby-httpx/docs/QueryApi.md b/samples/client/echo_api/ruby-httpx/docs/QueryApi.md
index 128b8cdc4b91..01de891f3188 100644
--- a/samples/client/echo_api/ruby-httpx/docs/QueryApi.md
+++ b/samples/client/echo_api/ruby-httpx/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 ## test_enum_ref_string
@@ -685,3 +686,71 @@ No authorization required
 - **Content-Type**: Not defined
 - **Accept**: text/plain
 
+
+## test_query_style_json_serialization_object
+
+> String test_query_style_json_serialization_object(opts)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::QueryApi.new
+opts = {
+  json_serialized_object_ref_string_query: OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']}), # Pet | 
+  json_serialized_object_array_ref_string_query: [OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']})] # Array<Pet> | 
+}
+
+begin
+  # Test query parameter(s)
+  result = api_instance.test_query_style_json_serialization_object(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object: #{e}"
+end
+```
+
+#### Using the test_query_style_json_serialization_object_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(String, Integer, Hash)> test_query_style_json_serialization_object_with_http_info(opts)
+
+```ruby
+begin
+  # Test query parameter(s)
+  data, status_code, headers = api_instance.test_query_style_json_serialization_object_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => String
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **json_serialized_object_ref_string_query** | [**Pet**](.md) |  | [optional] |
+| **json_serialized_object_array_ref_string_query** | [**Array&lt;Pet&gt;**](Pet.md) |  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
diff --git a/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/query_api.rb b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/query_api.rb
index f70d50c7398b..3100e3f68377 100644
--- a/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/query_api.rb
+++ b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api/query_api.rb
@@ -637,5 +637,68 @@ def test_query_style_form_explode_true_object_all_of_with_http_info(opts = {})
       end
       return data, status_code, headers
     end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [String]
+    def test_query_style_json_serialization_object(opts = {})
+      data, _status_code, _headers = test_query_style_json_serialization_object_with_http_info(opts)
+      data
+    end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [Array<(String, Integer, Hash)>] String data, response status code and response headers
+    def test_query_style_json_serialization_object_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: QueryApi.test_query_style_json_serialization_object ...'
+      end
+      # resource path
+      local_var_path = '/query/style_jsonSerialization/object'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+      query_params[:'json_serialized_object_ref_string_query'] = opts[:'json_serialized_object_ref_string_query'] if !opts[:'json_serialized_object_ref_string_query'].nil?
+      query_params[:'json_serialized_object_array_ref_string_query'] = @api_client.build_collection_param(opts[:'json_serialized_object_array_ref_string_query'], :csv) if !opts[:'json_serialized_object_array_ref_string_query'].nil?
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['text/plain']) unless header_params['Accept']
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body]
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'String'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"QueryApi.test_query_style_json_serialization_object",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:GET, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: QueryApi#test_query_style_json_serialization_object\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
   end
 end
diff --git a/samples/client/echo_api/ruby-typhoeus/README.md b/samples/client/echo_api/ruby-typhoeus/README.md
index 8349699dc548..e53e81e45095 100644
--- a/samples/client/echo_api/ruby-typhoeus/README.md
+++ b/samples/client/echo_api/ruby-typhoeus/README.md
@@ -109,6 +109,7 @@ Class | Method | HTTP request | Description
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_array_string**](docs/QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object**](docs/QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *OpenapiClient::QueryApi* | [**test_query_style_form_explode_true_object_all_of**](docs/QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*OpenapiClient::QueryApi* | [**test_query_style_json_serialization_object**](docs/QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ## Documentation for Models
diff --git a/samples/client/echo_api/ruby-typhoeus/docs/QueryApi.md b/samples/client/echo_api/ruby-typhoeus/docs/QueryApi.md
index 128b8cdc4b91..01de891f3188 100644
--- a/samples/client/echo_api/ruby-typhoeus/docs/QueryApi.md
+++ b/samples/client/echo_api/ruby-typhoeus/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 | [**test_query_style_form_explode_true_array_string**](QueryApi.md#test_query_style_form_explode_true_array_string) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object**](QueryApi.md#test_query_style_form_explode_true_object) | **GET** /query/style_form/explode_true/object | Test query parameter(s) |
 | [**test_query_style_form_explode_true_object_all_of**](QueryApi.md#test_query_style_form_explode_true_object_all_of) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s) |
+| [**test_query_style_json_serialization_object**](QueryApi.md#test_query_style_json_serialization_object) | **GET** /query/style_jsonSerialization/object | Test query parameter(s) |
 
 
 ## test_enum_ref_string
@@ -685,3 +686,71 @@ No authorization required
 - **Content-Type**: Not defined
 - **Accept**: text/plain
 
+
+## test_query_style_json_serialization_object
+
+> String test_query_style_json_serialization_object(opts)
+
+Test query parameter(s)
+
+Test query parameter(s)
+
+### Examples
+
+```ruby
+require 'time'
+require 'openapi_client'
+
+api_instance = OpenapiClient::QueryApi.new
+opts = {
+  json_serialized_object_ref_string_query: OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']}), # Pet | 
+  json_serialized_object_array_ref_string_query: [OpenapiClient::Pet.new({name: 'doggie', photo_urls: ['photo_urls_example']})] # Array<Pet> | 
+}
+
+begin
+  # Test query parameter(s)
+  result = api_instance.test_query_style_json_serialization_object(opts)
+  p result
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object: #{e}"
+end
+```
+
+#### Using the test_query_style_json_serialization_object_with_http_info variant
+
+This returns an Array which contains the response data, status code and headers.
+
+> <Array(String, Integer, Hash)> test_query_style_json_serialization_object_with_http_info(opts)
+
+```ruby
+begin
+  # Test query parameter(s)
+  data, status_code, headers = api_instance.test_query_style_json_serialization_object_with_http_info(opts)
+  p status_code # => 2xx
+  p headers # => { ... }
+  p data # => String
+rescue OpenapiClient::ApiError => e
+  puts "Error when calling QueryApi->test_query_style_json_serialization_object_with_http_info: #{e}"
+end
+```
+
+### Parameters
+
+| Name | Type | Description | Notes |
+| ---- | ---- | ----------- | ----- |
+| **json_serialized_object_ref_string_query** | [**Pet**](.md) |  | [optional] |
+| **json_serialized_object_array_ref_string_query** | [**Array&lt;Pet&gt;**](Pet.md) |  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
diff --git a/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/query_api.rb b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/query_api.rb
index f70d50c7398b..3100e3f68377 100644
--- a/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/query_api.rb
+++ b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api/query_api.rb
@@ -637,5 +637,68 @@ def test_query_style_form_explode_true_object_all_of_with_http_info(opts = {})
       end
       return data, status_code, headers
     end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [String]
+    def test_query_style_json_serialization_object(opts = {})
+      data, _status_code, _headers = test_query_style_json_serialization_object_with_http_info(opts)
+      data
+    end
+
+    # Test query parameter(s)
+    # Test query parameter(s)
+    # @param [Hash] opts the optional parameters
+    # @option opts [Pet] :json_serialized_object_ref_string_query 
+    # @option opts [Array<Pet>] :json_serialized_object_array_ref_string_query 
+    # @return [Array<(String, Integer, Hash)>] String data, response status code and response headers
+    def test_query_style_json_serialization_object_with_http_info(opts = {})
+      if @api_client.config.debugging
+        @api_client.config.logger.debug 'Calling API: QueryApi.test_query_style_json_serialization_object ...'
+      end
+      # resource path
+      local_var_path = '/query/style_jsonSerialization/object'
+
+      # query parameters
+      query_params = opts[:query_params] || {}
+      query_params[:'json_serialized_object_ref_string_query'] = opts[:'json_serialized_object_ref_string_query'] if !opts[:'json_serialized_object_ref_string_query'].nil?
+      query_params[:'json_serialized_object_array_ref_string_query'] = @api_client.build_collection_param(opts[:'json_serialized_object_array_ref_string_query'], :csv) if !opts[:'json_serialized_object_array_ref_string_query'].nil?
+
+      # header parameters
+      header_params = opts[:header_params] || {}
+      # HTTP header 'Accept' (if needed)
+      header_params['Accept'] = @api_client.select_header_accept(['text/plain']) unless header_params['Accept']
+
+      # form parameters
+      form_params = opts[:form_params] || {}
+
+      # http body (model)
+      post_body = opts[:debug_body]
+
+      # return_type
+      return_type = opts[:debug_return_type] || 'String'
+
+      # auth_names
+      auth_names = opts[:debug_auth_names] || []
+
+      new_options = opts.merge(
+        :operation => :"QueryApi.test_query_style_json_serialization_object",
+        :header_params => header_params,
+        :query_params => query_params,
+        :form_params => form_params,
+        :body => post_body,
+        :auth_names => auth_names,
+        :return_type => return_type
+      )
+
+      data, status_code, headers = @api_client.call_api(:GET, local_var_path, new_options)
+      if @api_client.config.debugging
+        @api_client.config.logger.debug "API called: QueryApi#test_query_style_json_serialization_object\nData: #{data.inspect}\nStatus code: #{status_code}\nHeaders: #{headers}"
+      end
+      return data, status_code, headers
+    end
   end
 end
diff --git a/samples/client/echo_api/typescript-axios/build/README.md b/samples/client/echo_api/typescript-axios/build/README.md
index 479e7036f275..0fa6a2c0061f 100644
--- a/samples/client/echo_api/typescript-axios/build/README.md
+++ b/samples/client/echo_api/typescript-axios/build/README.md
@@ -78,6 +78,7 @@ Class | Method | HTTP request | Description
 *QueryApi* | [**testQueryStyleFormExplodeTrueArrayString**](docs/QueryApi.md#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObject**](docs/QueryApi.md#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)
 *QueryApi* | [**testQueryStyleFormExplodeTrueObjectAllOf**](docs/QueryApi.md#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)
+*QueryApi* | [**testQueryStyleJsonSerializationObject**](docs/QueryApi.md#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)
 
 
 ### Documentation For Models
diff --git a/samples/client/echo_api/typescript-axios/build/api.ts b/samples/client/echo_api/typescript-axios/build/api.ts
index b3e78cb928fd..83b343462964 100644
--- a/samples/client/echo_api/typescript-axios/build/api.ts
+++ b/samples/client/echo_api/typescript-axios/build/api.ts
@@ -2250,6 +2250,46 @@ export const QueryApiAxiosParamCreator = function (configuration?: Configuration
 
 
     
+            setSearchParams(localVarUrlObj, localVarQueryParameter);
+            let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
+            localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
+
+            return {
+                url: toPathString(localVarUrlObj),
+                options: localVarRequestOptions,
+            };
+        },
+        /**
+         * Test query parameter(s)
+         * @summary Test query parameter(s)
+         * @param {Pet} [jsonSerializedObjectRefStringQuery] 
+         * @param {Array<Pet>} [jsonSerializedObjectArrayRefStringQuery] 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        testQueryStyleJsonSerializationObject: async (jsonSerializedObjectRefStringQuery?: Pet, jsonSerializedObjectArrayRefStringQuery?: Array<Pet>, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+            const localVarPath = `/query/style_jsonSerialization/object`;
+            // use dummy base URL string because the URL constructor only accepts absolute URLs.
+            const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
+            let baseOptions;
+            if (configuration) {
+                baseOptions = configuration.baseOptions;
+            }
+
+            const localVarRequestOptions = { method: 'GET', ...baseOptions, ...options};
+            const localVarHeaderParameter = {} as any;
+            const localVarQueryParameter = {} as any;
+
+            if (jsonSerializedObjectRefStringQuery !== undefined) {
+                localVarQueryParameter['json_serialized_object_ref_string_query'] = jsonSerializedObjectRefStringQuery;
+            }
+
+            if (jsonSerializedObjectArrayRefStringQuery) {
+                localVarQueryParameter['json_serialized_object_array_ref_string_query'] = jsonSerializedObjectArrayRefStringQuery.join(COLLECTION_FORMATS.csv);
+            }
+
+
+    
             setSearchParams(localVarUrlObj, localVarQueryParameter);
             let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
             localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
@@ -2404,6 +2444,20 @@ export const QueryApiFp = function(configuration?: Configuration) {
             const localVarOperationServerBasePath = operationServerMap['QueryApi.testQueryStyleFormExplodeTrueObjectAllOf']?.[localVarOperationServerIndex]?.url;
             return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
         },
+        /**
+         * Test query parameter(s)
+         * @summary Test query parameter(s)
+         * @param {Pet} [jsonSerializedObjectRefStringQuery] 
+         * @param {Array<Pet>} [jsonSerializedObjectArrayRefStringQuery] 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        async testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery?: Pet, jsonSerializedObjectArrayRefStringQuery?: Array<Pet>, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<string>> {
+            const localVarAxiosArgs = await localVarAxiosParamCreator.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, options);
+            const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
+            const localVarOperationServerBasePath = operationServerMap['QueryApi.testQueryStyleJsonSerializationObject']?.[localVarOperationServerIndex]?.url;
+            return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
+        },
     }
 };
 
@@ -2519,6 +2573,17 @@ export const QueryApiFactory = function (configuration?: Configuration, basePath
         testQueryStyleFormExplodeTrueObjectAllOf(queryObject?: DataQuery, options?: RawAxiosRequestConfig): AxiosPromise<string> {
             return localVarFp.testQueryStyleFormExplodeTrueObjectAllOf(queryObject, options).then((request) => request(axios, basePath));
         },
+        /**
+         * Test query parameter(s)
+         * @summary Test query parameter(s)
+         * @param {Pet} [jsonSerializedObjectRefStringQuery] 
+         * @param {Array<Pet>} [jsonSerializedObjectArrayRefStringQuery] 
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery?: Pet, jsonSerializedObjectArrayRefStringQuery?: Array<Pet>, options?: RawAxiosRequestConfig): AxiosPromise<string> {
+            return localVarFp.testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, options).then((request) => request(axios, basePath));
+        },
     };
 };
 
@@ -2653,6 +2718,19 @@ export class QueryApi extends BaseAPI {
     public testQueryStyleFormExplodeTrueObjectAllOf(queryObject?: DataQuery, options?: RawAxiosRequestConfig) {
         return QueryApiFp(this.configuration).testQueryStyleFormExplodeTrueObjectAllOf(queryObject, options).then((request) => request(this.axios, this.basePath));
     }
+
+    /**
+     * Test query parameter(s)
+     * @summary Test query parameter(s)
+     * @param {Pet} [jsonSerializedObjectRefStringQuery] 
+     * @param {Array<Pet>} [jsonSerializedObjectArrayRefStringQuery] 
+     * @param {*} [options] Override http request option.
+     * @throws {RequiredError}
+     * @memberof QueryApi
+     */
+    public testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery?: Pet, jsonSerializedObjectArrayRefStringQuery?: Array<Pet>, options?: RawAxiosRequestConfig) {
+        return QueryApiFp(this.configuration).testQueryStyleJsonSerializationObject(jsonSerializedObjectRefStringQuery, jsonSerializedObjectArrayRefStringQuery, options).then((request) => request(this.axios, this.basePath));
+    }
 }
 
 /**
diff --git a/samples/client/echo_api/typescript-axios/build/docs/QueryApi.md b/samples/client/echo_api/typescript-axios/build/docs/QueryApi.md
index 29f6bf8ad33c..81bdddbf0288 100644
--- a/samples/client/echo_api/typescript-axios/build/docs/QueryApi.md
+++ b/samples/client/echo_api/typescript-axios/build/docs/QueryApi.md
@@ -14,6 +14,7 @@ All URIs are relative to *http://localhost:3000*
 |[**testQueryStyleFormExplodeTrueArrayString**](#testquerystyleformexplodetruearraystring) | **GET** /query/style_form/explode_true/array_string | Test query parameter(s)|
 |[**testQueryStyleFormExplodeTrueObject**](#testquerystyleformexplodetrueobject) | **GET** /query/style_form/explode_true/object | Test query parameter(s)|
 |[**testQueryStyleFormExplodeTrueObjectAllOf**](#testquerystyleformexplodetrueobjectallof) | **GET** /query/style_form/explode_true/object/allOf | Test query parameter(s)|
+|[**testQueryStyleJsonSerializationObject**](#testquerystylejsonserializationobject) | **GET** /query/style_jsonSerialization/object | Test query parameter(s)|
 
 # **testEnumRefString**
 > string testEnumRefString()
@@ -545,3 +546,58 @@ No authorization required
 
 [[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
 
+# **testQueryStyleJsonSerializationObject**
+> string testQueryStyleJsonSerializationObject()
+
+Test query parameter(s)
+
+### Example
+
+```typescript
+import {
+    QueryApi,
+    Configuration,
+    Pet
+} from '@openapitools/typescript-axios-echo-api';
+
+const configuration = new Configuration();
+const apiInstance = new QueryApi(configuration);
+
+let jsonSerializedObjectRefStringQuery: Pet; // (optional) (default to undefined)
+let jsonSerializedObjectArrayRefStringQuery: Array<Pet>; // (optional) (default to undefined)
+
+const { status, data } = await apiInstance.testQueryStyleJsonSerializationObject(
+    jsonSerializedObjectRefStringQuery,
+    jsonSerializedObjectArrayRefStringQuery
+);
+```
+
+### Parameters
+
+|Name | Type | Description  | Notes|
+|------------- | ------------- | ------------- | -------------|
+| **jsonSerializedObjectRefStringQuery** | **Pet** |  | (optional) defaults to undefined|
+| **jsonSerializedObjectArrayRefStringQuery** | **Array&lt;Pet&gt;** |  | (optional) defaults to undefined|
+
+
+### Return type
+
+**string**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+|**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
diff --git a/samples/server/echo_api/erlang-server/priv/openapi.json b/samples/server/echo_api/erlang-server/priv/openapi.json
index be217ad12e5d..1538e9de3520 100644
--- a/samples/server/echo_api/erlang-server/priv/openapi.json
+++ b/samples/server/echo_api/erlang-server/priv/openapi.json
@@ -582,6 +582,52 @@
         "tags" : [ "query" ]
       }
     },
+    "/query/style_jsonSerialization/object" : {
+      "get" : {
+        "description" : "Test query parameter(s)",
+        "operationId" : "test/query/style_jsonSerialization/object",
+        "parameters" : [ {
+          "content" : {
+            "application/json" : {
+              "schema" : {
+                "$ref" : "#/components/schemas/Pet"
+              }
+            }
+          },
+          "in" : "query",
+          "name" : "json_serialized_object_ref_string_query",
+          "required" : false
+        }, {
+          "content" : {
+            "application/json" : {
+              "schema" : {
+                "items" : {
+                  "$ref" : "#/components/schemas/Pet"
+                },
+                "type" : "array"
+              }
+            }
+          },
+          "in" : "query",
+          "name" : "json_serialized_object_array_ref_string_query",
+          "required" : false
+        } ],
+        "responses" : {
+          "200" : {
+            "content" : {
+              "text/plain" : {
+                "schema" : {
+                  "type" : "string"
+                }
+              }
+            },
+            "description" : "Successful operation"
+          }
+        },
+        "summary" : "Test query parameter(s)",
+        "tags" : [ "query" ]
+      }
+    },
     "/body/application/octetstream/binary" : {
       "post" : {
         "description" : "Test body parameter(s)",
diff --git a/samples/server/echo_api/erlang-server/src/openapi_api.erl b/samples/server/echo_api/erlang-server/src/openapi_api.erl
index 3ff344a87066..71855ae951ec 100644
--- a/samples/server/echo_api/erlang-server/src/openapi_api.erl
+++ b/samples/server/echo_api/erlang-server/src/openapi_api.erl
@@ -81,6 +81,7 @@ accept_callback(Class, OperationID, Req0, Context0) ->
     'test/query/style_form/explode_true/array_string' | %% Test query parameter(s)
     'test/query/style_form/explode_true/object' | %% Test query parameter(s)
     'test/query/style_form/explode_true/object/allOf' | %% Test query parameter(s)
+    'test/query/style_jsonSerialization/object' | %% Test query parameter(s)
     {error, unknown_operation}.
 
 -type request_param() :: atom().
@@ -207,6 +208,8 @@ validate_response('test/query/style_form/explode_true/object', 200, Body, Valida
     validate_response_body('binary', 'string', Body, ValidatorState);
 validate_response('test/query/style_form/explode_true/object/allOf', 200, Body, ValidatorState) ->
     validate_response_body('binary', 'string', Body, ValidatorState);
+validate_response('test/query/style_jsonSerialization/object', 200, Body, ValidatorState) ->
+    validate_response_body('binary', 'string', Body, ValidatorState);
 validate_response(_OperationID, _Code, _Body, _ValidatorState) ->
     ok.
 
@@ -336,6 +339,11 @@ request_params('test/query/style_form/explode_true/object/allOf') ->
     [
         'query_object'
     ];
+request_params('test/query/style_jsonSerialization/object') ->
+    [
+        'json_serialized_object_ref_string_query',
+        'json_serialized_object_array_ref_string_query'
+    ];
 request_params(_) ->
     error(unknown_operation).
 
@@ -675,6 +683,20 @@ request_param_info('test/query/style_form/explode_true/object/allOf', 'query_obj
             not_required
         ]
     };
+request_param_info('test/query/style_jsonSerialization/object', 'json_serialized_object_ref_string_query') ->
+    #{
+        source => qs_val,
+        rules => [
+            not_required
+        ]
+    };
+request_param_info('test/query/style_jsonSerialization/object', 'json_serialized_object_array_ref_string_query') ->
+    #{
+        source => qs_val,
+        rules => [
+            not_required
+        ]
+    };
 request_param_info(OperationID, Name) ->
     error({unknown_param, OperationID, Name}).
 
diff --git a/samples/server/echo_api/erlang-server/src/openapi_query_handler.erl b/samples/server/echo_api/erlang-server/src/openapi_query_handler.erl
index 25811927d234..b6a14022b344 100644
--- a/samples/server/echo_api/erlang-server/src/openapi_query_handler.erl
+++ b/samples/server/echo_api/erlang-server/src/openapi_query_handler.erl
@@ -42,6 +42,10 @@ Test query parameter(s)
 Test query parameter(s).
 Test query parameter(s)
 
+- `GET` to `/query/style_jsonSerialization/object`, OperationId: `test/query/style_jsonSerialization/object`:
+Test query parameter(s).
+Test query parameter(s)
+
 """.
 
 -behaviour(cowboy_rest).
@@ -74,7 +78,8 @@ Test query parameter(s)
     | 'test/query/style_form/explode_false/array_string' %% Test query parameter(s)
     | 'test/query/style_form/explode_true/array_string' %% Test query parameter(s)
     | 'test/query/style_form/explode_true/object' %% Test query parameter(s)
-    | 'test/query/style_form/explode_true/object/allOf'. %% Test query parameter(s)
+    | 'test/query/style_form/explode_true/object/allOf' %% Test query parameter(s)
+    | 'test/query/style_jsonSerialization/object'. %% Test query parameter(s)
 
 
 -record(state,
@@ -122,6 +127,8 @@ allowed_methods(Req, #state{operation_id = 'test/query/style_form/explode_true/o
     {[<<"GET">>], Req, State};
 allowed_methods(Req, #state{operation_id = 'test/query/style_form/explode_true/object/allOf'} = State) ->
     {[<<"GET">>], Req, State};
+allowed_methods(Req, #state{operation_id = 'test/query/style_jsonSerialization/object'} = State) ->
+    {[<<"GET">>], Req, State};
 allowed_methods(Req, State) ->
     {[], Req, State}.
 
@@ -152,6 +159,8 @@ content_types_accepted(Req, #state{operation_id = 'test/query/style_form/explode
     {[], Req, State};
 content_types_accepted(Req, #state{operation_id = 'test/query/style_form/explode_true/object/allOf'} = State) ->
     {[], Req, State};
+content_types_accepted(Req, #state{operation_id = 'test/query/style_jsonSerialization/object'} = State) ->
+    {[], Req, State};
 content_types_accepted(Req, State) ->
     {[], Req, State}.
 
@@ -177,6 +186,8 @@ valid_content_headers(Req, #state{operation_id = 'test/query/style_form/explode_
     {true, Req, State};
 valid_content_headers(Req, #state{operation_id = 'test/query/style_form/explode_true/object/allOf'} = State) ->
     {true, Req, State};
+valid_content_headers(Req, #state{operation_id = 'test/query/style_jsonSerialization/object'} = State) ->
+    {true, Req, State};
 valid_content_headers(Req, State) ->
     {false, Req, State}.
 
@@ -222,6 +233,10 @@ content_types_provided(Req, #state{operation_id = 'test/query/style_form/explode
     {[
       {<<"text/plain">>, handle_type_provided}
      ], Req, State};
+content_types_provided(Req, #state{operation_id = 'test/query/style_jsonSerialization/object'} = State) ->
+    {[
+      {<<"text/plain">>, handle_type_provided}
+     ], Req, State};
 content_types_provided(Req, State) ->
     {[], Req, State}.
 
diff --git a/samples/server/echo_api/erlang-server/src/openapi_router.erl b/samples/server/echo_api/erlang-server/src/openapi_router.erl
index aae95bdc32ec..9774a68b851c 100644
--- a/samples/server/echo_api/erlang-server/src/openapi_router.erl
+++ b/samples/server/echo_api/erlang-server/src/openapi_router.erl
@@ -235,5 +235,12 @@ get_operations() ->
             path => "/query/style_form/explode_true/object/allOf",
             method => <<"GET">>,
             handler => 'openapi_query_handler'
+        },
+       'test/query/style_jsonSerialization/object' => #{
+            servers => [],
+            base_path => "",
+            path => "/query/style_jsonSerialization/object",
+            method => <<"GET">>,
+            handler => 'openapi_query_handler'
         }
     }.

From ecfc23d31249e23e04928f87c513005554fc2af3 Mon Sep 17 00:00:00 2001
From: Mattias-Sehlstedt <60173714+Mattias-Sehlstedt@users.noreply.github.com>
Date: Sat, 9 Aug 2025 18:53:20 +0200
Subject: [PATCH 4/4] Adjust indentation for specification

---
 .../openapi-generator/src/test/resources/3_0/echo_api.yaml    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
index 68d0ab20668d..38b620fd3643 100644
--- a/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/echo_api.yaml
@@ -457,8 +457,8 @@ paths:
         explode: true #default
         schema:
           allOf:
-            - $ref: '#/components/schemas/Bird'
-            - $ref: '#/components/schemas/Category'
+          - $ref: '#/components/schemas/Bird'
+          - $ref: '#/components/schemas/Category'
       responses:
         '200':
           description: Successful operation