[Spring Boot + JPA] LV.7

1️⃣ 요구사항 정리

Lv 7. 댓글 CRUD 도전

• 생성한 일정에 댓글을 남길 수 있습니다.
• 댓글과 일정은 연관관계를 가집니다.
• 댓글을 저장, 조회, 수정, 삭제할 수 있습니다.
• 댓글은 아래와 같은 필드를 가집니다.
• 댓글 내용, 작성일, 수정일, 유저 고유 식별자, 일정 고유 식별자 필드
• 작성일, 수정일 필드는 JPA Auditing을 활용하여 적용합니다.

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2️⃣ API 명세

Method	URL	설명
POST	/comments/schedules/{scheduleId}	댓글 등록
GET	/comments/schedules/{scheduleId}	특정 일정의 댓글 전체 조회
PATCH	/comments/schedules/{scheduleId}/{commentId}	댓글 수정
DELETE	/comments/schedules/{scheduleId}/{commentId}	댓글 삭제

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3️⃣ ERD

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4️⃣ 주요 코드(댓글 수정)

(CommentController.java)

@RestController
@RequiredArgsConstructor
@RequestMapping("/comments")
public class CommentController {
    private final CommentService commentService;
    
        @PatchMapping("/schedules/{scheduleId}/{commentId}")
    public ResponseEntity<UpdateCommentReponseDto> updateComment(
            @PathVariable Long scheduleId,
            @PathVariable Long commentId,
            @Valid @RequestBody UpdateCommentRequestDto dto,
            HttpServletRequest request
    ) {
        Long authorId = (Long) request.getSession().getAttribute(SessionConst.LOGIN_AUTHOR);
        UpdateCommentReponseDto updateCommentReponseDto = commentService.updateComment(dto, commentId, authorId, scheduleId);

        return new ResponseEntity<>(updateCommentReponseDto, HttpStatus.OK);
    }
 }

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(UpdateCommentRequestDto.java)

@Getter
@NoArgsConstructor
public class UpdateCommentRequestDto {
    @NotBlank(message = "내용을 적어주세요")
    @Size(max = 100, message = "내용은 100자 이하로 적어주세요")
    private String content;
}

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(CommentService.java)

    @Override
    @Transactional
    public UpdateCommentReponseDto updateComment(UpdateCommentRequestDto dto, Long commentId, Long authorId, Long scheduleId) {
        Comment comment = commentRepository.findByIdOrElseThrow(commentId);

        comment.isAuthorId(authorId);
        comment.isScheduleId(scheduleId);
        comment.update(dto.getContent());

        return new UpdateCommentReponseDto(comment.getAuthor().getName(), comment.getContent(), comment.getUpdatedDate());
    }
 }

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(CommentRepository.java)

public interface CommentRepository extends JpaRepository<Comment, Long> {
    default Comment findByIdOrElseThrow(Long commentId) {
        return findById(commentId).orElseThrow(() -> new CustomException(ExceptionCode.COMMENT_NOT_FOUND));
    }
    List<Comment> findBySchedule_ScheduleId(Long scheduleId);
}

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(Commnet.java)

@Getter
@Entity
@Table(name = "comment")
public class Comment extends BaseEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long commentId;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "schedule_id")
    private Schedule schedule;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "author_id")
    private Author author;

    @Column(nullable = false)
    private String content;

    public Comment() {

    }
    
        public void update(String content) {
        this.content = content;
    }
 }

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📌 GitHub 저장소: https://github.com/sukh115/schedulerJpa/lv7