我有一个用户类，它与评论和帖子有一对多的关系。每个用户可以有许多帖子和评论。每个帖子也可以有许多评论。问题是当我试图删除帖子时，删除方法运行，但它不会从数据库中删除。奇怪的是，当我没有从头部获取用户并将其发送到删除方法并发送新用户时（）的方法，它的工作正确。我卡住了，我真的你的帮助。
用户类别

@Entity
@Getter @Setter
public class User {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private Long userId;
    private String email;

    @OneToMany (mappedBy = "user", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private List<Post> posts;

    @OneToMany (mappedBy = "user", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private List<Comment> comments;
}

岗位类

@Entity
@Getter @Setter
public class Post {

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

    @OneToMany (mappedBy = "post", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private List<Comment> comments;

    @ManyToOne(fetch = FetchType.LAZY)
    @OnDelete(action = OnDeleteAction.CASCADE)
    @JsonIgnore
    @JoinColumn (name = "user_id")
    private User user;
}

POST控制器类

@RestController
@RequestMapping("/api/posts")
@AllArgsConstructor
public class PostController {

    private final PostService postService;
    private final UserService userService;

    @DeleteMapping("/{postId}")
    public ResponseEntity<?> deletePostById (@PathVariable Long postId, @RequestHeader("Authorization") String authorization) {

        Post post = postService.getPostById(postId).getData();
        String email = JwtUtils.getEmailFromHeader(authorization);
        User user= userService.getUserByEmail(email);
        Result result = postService.deletePost(post, user);
        return new ResponseEntity<>(result, HttpStatus.OK);        
    }
}

POST服务类中的DELETE方法

public Result deletePost(Post post, User user) {

        try {
            if (post == null) {
                return new Result(false, POST_NOT_FOUND);
            }
            else if (user.getUserId().equals(post.getUser().getUserId())) {

                postRepository.delete(post);
                return new Result(true, POST_DELETED);
            }
            else {
                return new Result(false, PERMISSION_DENIED);
            }
        }
        catch (Exception e) {
            return new Result(false, e.getMessage());
        }
    }