fix: support dash in property names (Pydantic generator) (#1955)

Co-authored-by: Anders Hellerup Madsen <ahem@github.com>

Author: ahem

examples/generate-python-pydantic-models/__snapshots__/index.spec.ts.snap

@@ -3,10 +3,11 @@
 exports[`Should be able to render python models and should log expected output to console: class-model 1`] = `
 Array [
   "class Root(BaseModel): 
-  optionalField: Optional[str] = Field(alias='''this field is optional''', default=None)
-  requiredField: str = Field(alias='''this field is required''')
+  optionalField: Optional[str] = Field(description='''this field is optional''', default=None)
+  requiredField: str = Field(description='''this field is required''')
   noDescription: Optional[str] = Field(default=None)
   options: Optional[Options] = Field(default=None)
+  contentType: Optional[str] = Field(default=None, alias='''content-type''')
 ",
 ]
 `;

examples/generate-python-pydantic-models/index.ts

@@ -26,7 +26,8 @@ const jsonSchemaDraft7 = {
       $id: 'options',
       type: ['integer', 'boolean', 'string'],
       enum: [123, 213, true, 'Run']
-    }
+    },
+    'content-type': { type: 'string' }
   }
 };
 

src/generators/python/constrainer/PropertyKeyConstrainer.ts

@@ -25,10 +25,10 @@ export type PropertyKeyConstraintOptions = {
 
 export const DefaultPropertyKeyConstraints: PropertyKeyConstraintOptions = {
   NO_SPECIAL_CHAR: (value: string) => {
-    //Exclude ` ` because it gets formatted by NAMING_FORMATTER
+    //Exclude ` ` and `-` because they gets formatted by NAMING_FORMATTER
     //Exclude '_' because they are allowed
     return FormatHelpers.replaceSpecialCharacters(value, {
-      exclude: [' ', '_'],
+      exclude: [' ', '-', '_'],
       separator: '_'
     });
   },

src/generators/python/presets/Pydantic.ts

@@ -33,17 +33,25 @@ const PYTHON_PYDANTIC_CLASS_PRESET: ClassPresetType<PythonOptions> = {
       type = `Optional[${type}]`;
     }
 
-    const alias = params.property.property.originalInput['description']
-      ? `alias='''${params.property.property.originalInput['description']}'''`
-      : '';
-    const defaultValue = params.property.required ? '' : 'default=None';
-
-    if (alias && defaultValue) {
-      return `${propertyName}: ${type} = Field(${alias}, ${defaultValue})`;
-    } else if (alias) {
-      return `${propertyName}: ${type} = Field(${alias})`;
+    const decoratorArgs: string[] = [];
+
+    if (params.property.property.originalInput['description']) {
+      decoratorArgs.push(
+        `description='''${params.property.property.originalInput['description']}'''`
+      );
+    }
+    if (!params.property.required) {
+      decoratorArgs.push('default=None');
     }
-    return `${propertyName}: ${type} = Field(${defaultValue})`;
+    if (
+      params.property.propertyName !== params.property.unconstrainedPropertyName
+    ) {
+      decoratorArgs.push(
+        `alias='''${params.property.unconstrainedPropertyName}'''`
+      );
+    }
+
+    return `${propertyName}: ${type} = Field(${decoratorArgs.join(', ')})`;
   },
   ctor: () => '',
   getter: () => '',

test/generators/python/presets/__snapshots__/Pydantic.spec.ts.snap

@@ -2,7 +2,7 @@
 
 exports[`PYTHON_PYDANTIC_PRESET should render pydantic for class 1`] = `
 "class Test(BaseModel): 
-  prop: Optional[str] = Field(alias='''test
+  prop: Optional[str] = Field(description='''test
     multi
     line
     description''', default=None)