EntityNotFoundException: Unable to find com.aloharoombackend.model.HomeImage with id 1

 

 

https://bkjeon1614.tistory.com/35

javax.persistence.EntityNotFoundException: Unable to find ... with id 0 에러

https://sbe03005dev.tistory.com/entry/JPA-orphanRemoval

[JPA] orphanRemoval

 

기존

Home

@Entity
@Getter
@NoArgsConstructor
public class Home {
	...
    @OneToMany(mappedBy = "home")
    private List<HomeImage> homeImages = new ArrayList<>();
	...
 }

BoardController

//게시물 삭제
    @DeleteMapping("/{boardId}")
    public ResponseEntity deleteBoard(@PathVariable Long boardId) {
        //board, home, homeImage 삭제
        Board board = boardService.findOne(boardId);
        Home home = homeService.findOne(board.getHome().getId());
        List<HomeImage> homeImages = home.getHomeImages();

        boardService.delete(board);
        homeImages.forEach(homeImageService::delete);
        homeService.delete(home); //여기서 문제

        return ResponseEntity.ok("");
    }

• 이때, Home은 삭제된 HomeImage를 가지고 있는데 Home을 삭제해버리면 해당 HomeImage가 없으므로 오류 발생
• Home 먼저 삭제하면 되지 않느냐 => HomeImage가 Home을 참조하고 있기때문에 Home 먼저 삭제가 불가능

 

해결

Home

@Entity
@Getter
@NoArgsConstructor
public class Home {
	...
    @OneToMany(mappedBy = "home", cascade = CascadeType.ALL, orphanRemoval = true)
    private List<HomeImage> homeImages = new ArrayList<>();
	...
 }

• orphanRemoval: 부모 엔티티와 연관관계가 끊어진 자식 엔티티를 자동으로 삭제해주는 기능이다.
• Home이 HomeImage의 생명주기를 관리한다.
  • DB에서 Home을 삭제하면 연관된 HomeImage도 삭제

BoardController

//게시물 삭제
    @DeleteMapping("/{boardId}")
    public ResponseEntity deleteBoard(@PathVariable Long boardId) {
        //board, home, homeImage 삭제
        Board board = boardService.findOne(boardId);
        Home home = homeService.findOne(board.getHome().getId());
        List<HomeImage> homeImages = home.getHomeImages();

        boardService.delete(board);
        homeService.delete(home); //HomeImage의 생명주기를 관리함으로 Home을 삭제하면 연관된 HomeImage들이 삭제된다.

        return ResponseEntity.ok("");
    }

• Home을 삭제하면 연관된 HomeImage도 삭제