Working basic CRUD

.gitignore

@@ -4,6 +4,7 @@ build/
 !gradle/wrapper/gradle-wrapper.jar
 !**/src/main/**/build/
 !**/src/test/**/build/
+**/*.db
 
 ### STS ###
 .apt_generated

build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
 	id("io.spring.dependency-management") version "1.1.4"
 	kotlin("jvm") version "1.9.21"
 	kotlin("plugin.spring") version "1.9.21"
+	kotlin("plugin.jpa") version "1.9.21"
 }
 
 group = "com.example"
@@ -19,10 +20,13 @@ repositories {
 }
 
 dependencies {
+	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
 	implementation("org.springframework.boot:spring-boot-starter-thymeleaf")
 	implementation("org.springframework.boot:spring-boot-starter-web")
 	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
 	implementation("org.jetbrains.kotlin:kotlin-reflect")
+	implementation("org.xerial:sqlite-jdbc")
+	implementation("org.hibernate.orm:hibernate-community-dialects")
 	developmentOnly("org.springframework.boot:spring-boot-devtools")
 	testImplementation("org.springframework.boot:spring-boot-starter-test")
 }

src/main/kotlin/com/example/demo/DemoApplication.kt

@@ -2,8 +2,6 @@ package com.example.demo
 
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
-import org.springframework.web.bind.annotation.GetMapping
-import org.springframework.web.bind.annotation.RequestParam
 
 
 @SpringBootApplication
@@ -11,9 +9,4 @@ class DemoApplication
 
 fun main(args: Array<String>) {
 	runApplication<DemoApplication>(*args)
-}
-
-@GetMapping("/hello")
-fun hello(@RequestParam(value = "name", defaultValue = "World") name: String?): String {
-	return String.format("Hello %s!", name)
 }

src/main/kotlin/com/example/demo/controllers/UsersController.kt

@@ -0,0 +1,38 @@
+package com.example.demo.controllers
+
+import com.example.demo.entities.User
+import com.example.demo.repositories.UserRepository
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.web.bind.annotation.*
+
+@RestController
+class UsersController {
+    @Autowired
+    lateinit var repo: UserRepository
+
+    @GetMapping("/users")
+    fun index(): MutableIterable<User> {
+        return repo.findAll()
+    }
+
+    @GetMapping("/users/{id}")
+    fun show(@PathVariable id: Long): User? {
+        return repo.findById(id).get()
+    }
+
+    @PostMapping("/users")
+    fun create(@RequestBody newUser: User): User {
+        return repo.save(newUser)
+    }
+
+    @PatchMapping("/users/{id}")
+    fun update(@PathVariable id: Long, @RequestBody user: User): User {
+        user.id = id
+        return repo.save(user)
+    }
+
+    @DeleteMapping("/users/{id}")
+    fun destroy(@PathVariable id: Long) {
+        return repo.deleteById(id)
+    }
+}

src/main/kotlin/com/example/demo/entities/User.kt

@@ -0,0 +1,10 @@
+package com.example.demo.entities
+
+import jakarta.persistence.Entity
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.Id
+
+@Entity
+class User(
+        @Id @GeneratedValue var id: Long? = null,
+        var login: String)

src/main/kotlin/com/example/demo/repositories/UserRepository.kt

@@ -0,0 +1,6 @@
+package com.example.demo.repositories
+
+import com.example.demo.entities.User
+import org.springframework.data.repository.CrudRepository
+
+interface UserRepository : CrudRepository<User, Long>

src/main/resources/application.properties

@@ -1 +1,6 @@
-
+spring.datasource.url=jdbc:sqlite:test.db
+spring.datasource.driver-class-name=org.sqlite.JDBC
+spring.jpa.properties.hibernate.dialect=org.hibernate.community.dialect.SQLiteDialect
+spring.datasource.username=
+spring.datasource.password=
+spring.jpa.hibernate.ddl-auto=update