Add Spring Data JPA

HELP.md

@@ -15,6 +15,7 @@ For further reference, please consider the following sections:
 * [Spring for GraphQL](https://docs.spring.io/spring-boot/docs/3.2.4/reference/htmlsingle/index.html#web.graphql)
 * [Spring HATEOAS](https://docs.spring.io/spring-boot/docs/3.2.4/reference/htmlsingle/index.html#web.spring-hateoas)
 * [Vaadin](https://vaadin.com/docs)
+* [Spring Data JPA](https://docs.spring.io/spring-boot/docs/3.2.4/reference/htmlsingle/index.html#data.sql.jpa-and-spring-data)
 
 ### Guides
 The following guides illustrate how to use some features concretely:
@@ -26,6 +27,7 @@ The following guides illustrate how to use some features concretely:
 * [Building a GraphQL service](https://spring.io/guides/gs/graphql-server/)
 * [Building a Hypermedia-Driven RESTful Web Service](https://spring.io/guides/gs/rest-hateoas/)
 * [Creating CRUD UI with Vaadin](https://spring.io/guides/gs/crud-with-vaadin/)
+* [Accessing Data with JPA](https://spring.io/guides/gs/accessing-data-jpa/)
 
 ### Additional Links
 These additional references should also help you:

build.gradle.kts

@@ -4,10 +4,12 @@ plugins {
     id("org.springframework.boot") version "3.2.4"
     id("io.spring.dependency-management") version "1.1.4"
     id("com.netflix.dgs.codegen") version "6.0.3"
+    id("org.hibernate.orm") version "6.4.4.Final"
     id("org.graalvm.buildtools.native") version "0.9.28"
     id("com.vaadin") version "24.3.9"
     kotlin("jvm") version "1.9.23"
     kotlin("plugin.spring") version "1.9.23"
+    kotlin("plugin.jpa") version "1.9.23"
 }
 
 group = "pl.writeonly"
@@ -30,6 +32,7 @@ repositories {
 extra["vaadinVersion"] = "24.3.9"
 
 dependencies {
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
     implementation("org.springframework.boot:spring-boot-starter-graphql")
     implementation("org.springframework.boot:spring-boot-starter-hateoas")
     implementation("org.springframework.boot:spring-boot-starter-web")
@@ -72,3 +75,9 @@ tasks.generateJava {
     generateClient = true
 }
 
+hibernate {
+    enhancement {
+        enableAssociationManagement.set(true)
+    }
+}
+