的Symfony2式事件侦听

Question

加入收藏让我先解释一下什么是我想要做的事。

所以我认为有一个名为类型字段实体，称为属性（也可以是文本，电子邮件，或multi_option）和被叫的PropertyValue另一个实体，这些实体的财产

的价值所以我发现this tutorial和我问题是在EventListener中，而不是一个简单的字段，我怎样才能添加一个选择或复选框的其他实体的值？

这里有我的事件监听的代码，你可以看到我面临的问题

<?php 
namespace Comehoy\AdBundle\Form\EventListener; 

use Symfony\Component\Form\Event\DataEvent; 
use Symfony\Component\Form\FormFactoryInterface; 
use Symfony\Component\EventDispatcher\EventSubscriberInterface; 
use Symfony\Component\Form\FormEvents; 

class AddValueFieldSubscriber implements EventSubscriberInterface 
{ 
    private $factory; 

    public function __construct(FormFactoryInterface $factory) 
    { 
     $this->factory = $factory; 
    } 

    public static function getSubscribedEvents() 
    { 
     // Tells the dispatcher that we want to listen on the form.pre_set_data 
     // event and that the preSetData method should be called. 
     return array(FormEvents::PRE_SET_DATA => 'preSetData'); 
    } 

    public function preSetData(DataEvent $event) 
    { 
     $data = $event->getData(); 
     $form = $event->getForm(); 

     // During form creation setData() is called with null as an argument 
     // by the FormBuilder constructor. We're only concerned with when 
     // setData is called with an actual Entity object in it (whether new, 
     // or fetched with Doctrine). This if statement let's us skip right 
     // over the null condition. 
     if (null === $data) { 
      return; 
     } 

     // check if the ProprertyValue object is "new" 
     $type = $data->getI18nField()->getProperty()->getType(); 

     if ('multi_option' === substr($type, 0, 12)) { 
      /* 
      * 
      * Here is the problem since I'm kind of sure this is not the way to do this 
      * 
      */ 
      $builder = $this->factory->createNamedBuilder('entity', 'value'); 
      $builder->add('value', 'entity', array(
       'class' => 'ComehoyAdBundle:Translation\AdPropertyOption', 
       'query_builder' => function(EntityRepository $er) { 
        return $er->createQueryBuilder('po') 
         ->orderBy('po.value', 'ASC'); 
       } 
      )); 
     } else { 
      //It's not a multi option field so we use the type directly 
      $form->add($this->factory->createNamed($type, 'value')); 
     } 
    } 
} 

那么我基本上试图做的是，我可以在buildForm使用做一个类型的同样的事情$工具的详情参数

感谢

Answer 1

public function preSetData(DataEvent $event) 
{ 
    $data = $event->getData(); 
    $form = $event->getForm(); 

    $form->add($this->factory->createNamed('type', 'name', $data->getValue(), array(
      'class' => 'ComehoyAdBundle:Translation\AdPropertyOption', 
      'query_builder' => function(EntityRepository $er) { 
       return $er->createQueryBuilder('po') 
        ->orderBy('po.value', 'ASC'); 
      } 
    ))); 
} 

如果您使用的SF 2.1，则：

public function preSetData(DataEvent $event) 
{ 
    $data = $event->getData(); 
    $form = $event->getForm(); 

    $form->add($this->factory->createNamed('name', 'type', $data->getValue(), array(
      'class' => 'ComehoyAdBundle:Translation\AdPropertyOption', 
      'query_builder' => function(EntityRepository $er) { 
       return $er->createQueryBuilder('po') 
        ->orderBy('po.value', 'ASC'); 
      } 
    ))); 
}