CakePHP add action returning json - cakephp

Question

I have some questions on how I can improve this "add action" (method) in "controller":
1st: I'm using the add action only if post request. It's correct ?
2nd: This action doesn't have views ($this->autoRender = false;). It's correct ?
3rd: I set a response .json file to this action but I didn't change on routes to routing .json files (the file will be return when access localhost:8765/users/add). It's correct ?
4th: I'm using Enums(handmade) to store messages that will returned to user. It's correct ?
5th: I'm using an object to store the fields of message (that will returned to user), that object will be serialized and returned like this:
$this->response->body(json_encode($response)); // It's correct ?
Controller code:
public function add()
{
$this->autoRender = false;
$this->response->type('json');
$user = $this->Users->newEntity();
if ($this->request->is('post')) {
$user = $this->Users->patchEntity($user, $this->request->data);
if ($this->Users->save($user)) {
$this->Auth->setUser($user->toArray());
$response = new ResponseMessage();
$response->code = CodeEnum::USER_ADDED;
$response->name = NameEnum::USER_ADDED;
$response->type = TypeMessageEnum::SUCCESS;
$this->response->body(json_encode($response));
} else {
$response = new ResponseMessage();
$response->code = CodeEnum::USER_NOT_ADDED;
$response->name = NameEnum::USER_NOT_ADDED;
$response->type = TypeMessageEnum::ERROR;
$this->response->body(json_encode($response));
}
}
}
[UPDATE]
I put this on my controller:
$this->set('response', $response);
$this->set('_serialize', ['response']);
but return this json:
{response: {code: 1, name: "Login efetuado com sucesso.", message: null, type: "Sucesso"}}
but must be returned only:
{code: 1, name: "Login efetuado com sucesso.", message: null, type: "Sucesso"}

Answer 1

1st: I'm using the add action only if post request. It's correct ?
Yes
2nd: This action doesn't have views ($this->autoRender = false;). It's correct ?
Not really. Instead of setting json string to response body in controller you should use JsonView which does the job for you.
3rd: I set a response .json file to this action but I didn't change on routes to routing .json files (the file will be return when access localhost:8765/users/add). It's correct ?
That's fine. Using URL ending in not .json is not necessary. But you should set Accept header in request to application/json.
4th: I'm using Enums(handmade) to store messages that will returned to user. It's correct ?
That's fine. You could check out this enum plugin.
5th: I'm using an object to store the fields of message (that will returned to user), that object will be serialized and returned like this:
As stated above better to use JsonView.