No form errors shown in JsonResponse - Symfony - json

Question

I have a registration form with fields that are validated in User entity class. The validation works fine, however I can't return JsonResponse with form error messages in it.
My registration form controller method looks like this:
/**
* #Route("/register", name="register")
*/
public function registerAction(Request $request)
{
$user = new User();
$form = $this->createForm(RegistrationType::class, $user);
$form->handleRequest($request);
$errors = "";
if ($form->isSubmitted())
{
if ($form->isValid())
{
$password = $this->get('security.password_encoder')
->encodePassword($user, $user->getPlainPassword());
$user->setPassword($password);
$user->setIsActive(1);
$user->setLastname('none');
$em = $this->getDoctrine()->getManager();
$em->persist($user);
$em->flush();
return new JsonResponse(
array(
'message' => 'Success! User registered!',
), 200);
}
else
{
$errors = ($this->get('validator')->validate($form));
return new JsonResponse(
array(
'message' => 'Not registered',
'errors' => $errors,
), 400);
}
}
return $this->render(
'ImmoBundle::Security/register.html.twig',
array('form' => $form->createView(), 'errors' => $errors)
);
}
I get the following json response when I submit the registration form with invalid data:
{"message":"Not registered","errors":{}}
Actually I'm expecting that "errors":{} will contain some error fields, but it doesn't. Does anyone know what the problem here is?
UPD:
My RegistrationType looks like this:
class RegistrationType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('firstname', TextType::class)
->add('email', EmailType::class)
->add('plainPassword', RepeatedType::class, array(
'type' => PasswordType::class,
'first_options' => array('label' => 'Password'),
'second_options' => array('label' => 'Repeat password'),
'invalid_message' => "Passwords don't match!",
))
->add('register', SubmitType::class, array('label' => 'Register'));
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'ImmoBundle\Entity\User',
'csrf_protection' => true,
'csrf_field_name' => '_token',
'csrf_token_id' => 'authenticate',
));
}
}
UPD2: Found the solution. I needed to do this iteration and then call for getMessage():
$allErrors = ($this->get('validator')->validate($form));
foreach ($allErrors as $error)
{
$errors[] = $error->getMessage();
}

Answer 1

Form validated when you call $form->handleRequest($request);
To get form errors use getErrors method
$errors = $form->getErrors(true); // $errors will be Iterator
to convert errors object to messages array you can use code from this response - Handle form errors in controller and pass it to twig
This is exapmle how i'm process errors in one of my projects
$response = $this->get('http.response_formatter');
if (!$form->isValid()) {
$errors = $form->getErrors(true);
foreach ($errors as $error) {
$response->addError($error->getMessage(), Response::HTTP_BAD_REQUEST);
}
return $response->jsonResponse(Response::HTTP_BAD_REQUEST);
}
It's worked for me.
And also this can help you - Symfony2 : How to get form validation errors after binding the request to the form
You must set error_bubbling to true in your form type by explicitly setting the option for each and every field.