"status": 400, "error": "Bad Request", the method does not work out Ja-CodePudding

enter image description here Why the code doesn't work and how can I fix it

or you can somehow rewrite this method in a different way, I'm struggling for the second day I didn't find anything worthwhile on the Internet

Controller

@PostMapping(value = "message/{id}",params = MediaType.APPLICATION_JSON_UTF8_VALUE)
public Message createMessage(@RequestBody Message newMessage,  @PathVariable("id") Long id){
    return addMessage(newMessage,id);
}
private Message addMessage(Message message,Long id){
    return  messageRepository.save(new Message(message.getText(),userRepository.findById(id).get()));
}

Class

@Entity
@NoArgsConstructor
@Getter
@Setter
public class Message {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Integer id;
    private String text;
    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "user_id")
    private User author;

    public Message(String text, User author) {
        this.text = text;
        this.author = author;
    }
}

CodePudding user response：

I assume your RestController has RequestMapping set to "/api" - if dont then your url should be "localhost:8080/message/1".

If this does not help:

make sure the request hit method "createMessage" (for example set breakpoint in debug mode in this method and then try call it from postman) - if dont then make sure your annotations were imported from "org.springframework.web.bind.annotation".
make sure your body from postman is correct Message class

By the way:

Consider using DTO or Request classes to pass entity in/out your REST application - it will help you avoid circular reference in future and problems with de/serialization your entity.
Consider using ResponseEntity instead of returning object to output - method with ResponseEntity should be like: enter image description here