validation - 将验证器添加到自定义表单类型

Question

如何将验证器添加到 自定义表单类型 ?以 IBAN 为例。

use Symfony\Component\Validator\Constraints\IbanValidator;

class IBANType extends AbstractType
{
    public function getName()
    {
        return 'iban';
    }

    public function getParent()
    {
        return 'text';
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        //IbanValidator ???
    }
}

Here他们建议使用监听器:

The interface FormValidatorInterface was deprecated and will be removed in Symfony 2.3.

If you implemented custom validators using this interface, you can substitute them by event listeners listening to the FormEvents::POST_BIND (or any other of the *BIND events). In case you used the CallbackValidator class, you should now pass the callback directly to addEventListener.

但是怎么样？

Answer 1

尝试这个:

use Symfony\Component\Validator\Constraints\IbanValidator;

class IBANType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('iban', 'text', [
            'constraints' => [
                new IbanValidator(),
            ],
        ]);
    }
}