The option "constraints" does not exist

Question

I am using Symfony 2.6. I am trying to create a form without Entity, but get the following error:

The option "constraints" does not exist. Known options are: "action", "attr", "auto_initialize", "block_name", "by_reference", "compound", "csrf_field_name", "csrf_message", "csrf_protection", "csrf_provider", "csrf_token_id", "csrf_token_manager", "data", "data_class", "disabled", "empty_data", "error_bubbling", "inherit_data", "intention", "label", "label_attr", "label_format", "mapped", "max_length", "method", "pattern", "post_max_size_message", "property_path", "read_only", "required", "translation_domain", "trim", "virtual".

    class MessageType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('sender', 'text', [
                'constraints' => [
                    new Constraints\NotBlank(),
                ],
            ])
            ->add('recipient', 'email')
            ->add('message', 'textarea');
    }

    public function getName()
    {
        return 'message';
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $collectionConstraint = new Constraints\Collection(array(
            'fields' => [
                'sender' => [
                    new Constraints\NotBlank(),
                    new Constraints\Email(),
                ],
                'recipient' => [
                    new Constraints\NotBlank(),
                    new Constraints\Email(),
                ],
                'message' => [
                    new Constraints\NotBlank(),
                ],
            ],

        ));

        $resolver->setDefaults([
            'validation_constraints' => $collectionConstraint,
        ]);
    }
}

Using only setDefaultOptions shows no error, but it does not work, does not validate the fields.

As can be seen, tried anyway. I also tried as is the documentation for using the component form outbox, but get the same error.

http://symfony.com/doc/current/components/form/introduction.html#form-validation

EDIT

I also tried this way and get the same error.

    $form = $formFactory->createBuilder()
    ->add('task', 'text', array(
        'constraints' => new NotBlank(),
    ))
    ->add('dueDate', 'date', array(
        'constraints' => array(
            new NotBlank(),
            new Type('\DateTime'),
        )
    ))
    ->getForm();

Answer 1

The 'constraints' option is part of the Validator extension form. How I solved the problem:

$ValidatorExtension = new ValidatorExtension($validatorBuilder->getValidator());

$formRegistry = new FormRegistry([$csrfProvider, new CoreExtension(), $ValidatorExtension], Yii::$symfony->container->get('form.resolved_type_factory'));