No Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator

CommentSaveRequestDto

public class CommentSaveRequestDto {

    private User user;
    private Post post;
    private String content;
    private Comment comment;

    public Comment toEntity(User user, Post post) {
        return Comment.builder()
                .user(user)
                .post(post)
                .content(content)
                .parent(comment)
                .build();
    }
}

CommentController

@PostMapping("/api/v1/post/{postId}/comment")
public ResponseEntity save(@RequestBody CommentSaveRequestDto dto,
                           @PathVariable Long postId,
                           Principal principal) {
    Long userId = Long.parseLong(principal.getName());
    commentService.save(userId, postId, dto);
    return ResponseEntity.ok().body(dto);
}

에러발생

no Creators, like default constructor, exist

해결 방법

빈 생성자 추가

@NoArgsConstructor
public class CommentSaveRequestDto {

    private User user;
    private Post post;
    private String content;
    private Comment comment;

    public Comment toEntity(User user, Post post) {
        return Comment.builder()
                .user(user)
                .post(post)
                .content(content)
                .parent(comment)
                .build();
    }
}

완료!