java - API to save an entity is not working, status 415

Question

I'm working on the backend of a Web App using Java. I need to create an API that allows to save a project related to an existing client of a given company. "project" and "client" are two entities, and there is a OneToMany relation between them (a client can have many projects, but each project is related to just one client). This is my code:

@PostMapping("/{clientId}")
public ResponseEntity<?> addProject(@PathVariable Long clientId, @RequestBody Project project) {
  try {
    Optional<Client> client = clientRepository.findById(clientId);
    if (client.isPresent())
      project.setClient(client.get());
    project.setTasks(new ArrayList<>());
    project.setEmployees(new ArrayList<>());
    Project saved = projectRepository.save(project);
    return new ResponseEntity<>(saved, HttpStatus.CREATED);
  } catch (Exception e) {
    return new ResponseEntity<>(null, HttpStatus.INTERNAL_SERVER_ERROR);
  }
}

However, when I try to execute it, i get the error 415 Unsupported Media Type. Do you have any suggestion? Thanks!

Answer 1

等待大神答复