Symfony2:我的表单从isValid()返回false但从唯一约束条件返回getErrors()的空数组

Question

我有一个Customer实体,它只有一个唯一的电子邮件字段.我正在尝试编辑客户的电子邮件,验证工作正常.但是我在我的控制器中有这个:

public function updateAction(Request $request, $id) {
    $em = $this->getDoctrine()->getManager();

    $entity = $em->getRepository('AcmeDemoBundle:Customer')->find($id);

    if (!$entity) {
        throw $this->createNotFoundException('Unable to find Customer entity.');
    }


    $editForm = $this->createForm(new CustomerType(), $entity);
    $editForm->bind($request);
    if ($editForm->isValid()) {
        $em->persist($entity);
        $em->flush();

        return $this->redirect($this->generateUrl('ticket_result'));
    }
    var_dump($editForm->getErrors());

    return $this->render('AcmeDemoBundle:Customer:edit.html.twig', array(
                'entity' => $entity,
                'edit_form' => $editForm->createView(),
    ));
}

var_dump返回一个空数组,但验证器设置一个唯一错误,$editForm->isValid()返回false.有没有办法在验证期间检查控制器中的特定错误,还能解释它返回空错误数组的原因吗？基本上,如果出现错误,我想提供"合并"选项.

编辑:这是formtype:

namespace Acme\DemoBundle\Form;

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

class CustomerType extends AbstractType {


    public function buildForm(FormBuilderInterface $builder, array $options) {
        $builder
                ->add('email', 'email', array('required'=>true))
        ;

    }

    public function setDefaultOptions(OptionsResolverInterface $resolver) {
        $resolver->setDefaults(array(
            'data_class' => 'Acme\DemoBundle\Entity\Customer',
            'cascade_validation' => true,
        ));
    }

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

和树枝模板:

{% extends 'AcmeDemoBundle::layout.html.twig' %}
{% block body -%}
    <h1>Customer edit</h1>



  <form action="{{ path('customer_update', { 'id': entity.id }) }}" method="post" {{ form_enctype(edit_form) }}>
        <input type="hidden" name="_method" value="PUT" />
        {{ form_widget(edit_form) }}
        <p>
            <button type="submit">Edit</button>
        </p>
    </form>

{% endblock %}

这是我的验证:

Acme\DemoBundle\Entity\Customer:
    constraints:
      - Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity: 
          fields: email
          message: "A customer under that email address already exists"

    properties:
        email:
            - Email: ~

Answer 1

出于调试目的,您可以使用$form->getErrorsAsString()而不是$form->getErrors()使用Symfony 2.*

引用这个答案:

$form->getErrorsAsString() 应该只用于调试表单...它将包含每个子元素的错误,而不是$ form-> getErrors()的情况.

更新1:

"对于最新的Symfony版本,你必须$form->getErrors(true, false);改为使用.第一个param对应于deep第二个flatten"(参见@Roubi的评论)

Answer 2

好的，在这里找到了答案：

Symfony2 无效形式，无错误

事实证明，每个表单子项都有其自己的单独错误。当执行 var_dump 时

$editForm->getChildren()['email']->getErrors()

我得到：

array (size=1)
  0 => 
    object(Symfony\Component\Form\FormError)[531]
      private 'message' => string 'A customer under that email address already exists' (length=50)
      protected 'messageTemplate' => string 'A customer under that email address already exists' (length=50)
      protected 'messageParameters' => 
        array (size=0)
          empty
      protected 'messagePluralization' => null

我仍然想知道如何确定错误是由于独特的冲突而不解析错误消息字符串。