php – Symfony2：在Form Component中注入translation_domain的位置

我使用Symfony 2的表单组件创建一个表单.
由于验证错误是在不同的翻译域中翻译的,我想在创建表单期间将此信息作为选项(translation_domain)注入,但是找不到正确(成功)的位置设置…任何提示？

我使用自定义类型来捆绑我的表单信息.

我的自定义类型：

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

use Symfony\Component\Validator\ConsTraints\Collection;
use Symfony\Component\Validator\ConsTraints\NotBlank;

class LoginType extends AbstractType
{

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $collectionConsTraint = $collectionConsTraint = new Collection(array(
            'password' => array(new NotBlank(array('message' => 'custom.error.blank'))),'username' => array(new NotBlank(array('message' => 'custom.error.blank')))
        ));

        $resolver->setDefaults(array(
            'consTraints' => $collectionConsTraint
        ));
    }

    public function buildForm(FormBuilderInterface $builder,array $options)
    {
        $builder->add('username','text',array(
            'max_length'        => 250,'trim'              => true
        ));
        $builder->add('password','password','trim'              => true
        ));
    }

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

控制器中表单创建的相关代码片段：

$loginForm = $this->createForm(new LoginType(),$loginDefaultData);

$loginForm->bind($request);

[...]

return $this->render(
    'MyBundle:SubFolder:login.html.twig',array(
        'loginForm' => $loginForm->createView()
    )
);

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    // ...

    $resolver->setDefaults(array(
        'consTraints'        => $collectionConsTraint,'translation_domain' => 'customTranslationDomain'
    ));
}