Spring boot REST API 서버 만들기 2 - JPA

@Entity
@Table(name="musician")
public class Musician {
  // ..class body
}

@Entity
public class Musician {
  @Id
  private Long id;
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	compileOnly 'org.projectlombok:lombok'
	runtimeOnly 'com.h2database:h2'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation('org.springframework.boot:spring-boot-starter-test') {
		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
	}
}

spring.h2.console.enabled=true

spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.url=jdbc:h2:mem:review
spring.datasource.username=yundream
spring.datasource.password=1234

package co.kr.joinc.Todo.domain.review;

import lombok.Getter;
import lombok.NoArgsConstructor;

import javax.persistence.*;

@Getter
@NoArgsConstructor
@Entity
public class ReviewEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column
    private Long UserId;

    @Column(columnDefinition = "TEXT", nullable = false)
    private String Content;
}

package co.kr.joinc.Todo.domain.review;

import org.springframework.data.jpa.repository.JpaRepository;

public interface ReviewRepository extends JpaRepository<ReviewEntity, Long>{
}

package co.kr.joinc.Todo.dto.review;

import co.kr.joinc.Todo.domain.review.ReviewEntity;
import lombok.Builder;
import lombok.Getter;
import lombok.NoArgsConstructor;

@Getter
@NoArgsConstructor
public class ReviewPostRequestDto {
    private String content;
    private Long user_id;

    @Builder
    public ReviewPostRequestDto(String content, Long user_id) {
        this.content = content;
        this.user_id = user_id;
    }

    public ReviewEntity toEntity() {
        return ReviewEntity.builder()
                .content(content)
                .user_id(user_id)
                .build();
    }
}

package co.kr.joinc.Todo.service.review;

import co.kr.joinc.Todo.domain.review.ReviewRepository;
import co.kr.joinc.Todo.dto.review.ReviewPostRequestDto;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;

@RequiredArgsConstructor
@Service
public class ReviewPostService {
    private final ReviewRepository reviewRepository;

    @Transactional
    public Long save(ReviewPostRequestDto requestDto) {
        return reviewRepository.save(requestDto.toEntity()).getId();
    }
}

package co.kr.joinc.Todo.controller.review;

import co.kr.joinc.Todo.dto.review.ReviewPostRequestDto;
import co.kr.joinc.Todo.service.review.ReviewPostService;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RequiredArgsConstructor
@RestController
public class ReviewPostController {
    private final ReviewPostService reviewPostService;

    @PostMapping("/api/v1/review")
    public Long save(@RequestBody ReviewPostRequestDto requestDto) {
        return reviewPostService.save(requestDto);
    }
}

{
	"user_id": 1234,
	"content": "안녕하세요. 만나서 반갑습니다."
}

# curl -XPOST -H "Content-Type: application/json" localhost:8080/api/v1/review -d @test.json

SQL> SELECT * FROM review_entity;

+------+---------------------------------+-----------+
| ID   | CONTENT                         | USER_ID   |
+------+---------------------------------+-----------+
| 1    | 안녕하세요. 만나서 반갑습니다.  | 1234      |
+------+---------------------------------+-----------+