symfony2嵌入式收藏编辑表单问题

Question

我对edititng嵌入式收藏表单有问题。我有两对多关系的对象。当我用相关的“照片”成功创建一个“良好”的对象时。当我通过添加一些新照片更新Good对象时，所有工作都很好。但是，如果我在删除更新照片后尝试删除某个Good对象中的一张照片。

Good.php

/** 
* @ORM\OneToMany(targetEntity="Photo", mappedBy="good", cascade={"persist", "remove"}) 
**/ 
private $photos; 

/** 
* Add photos 
* 
* @param \VDKP\Site\BackendBundle\Entity\Photo $photos 
* @return Good 
*/ 
public function addPhoto(\VDKP\Site\BackendBundle\Entity\Photo $photos) 
{ 
    $photos->setGood($this); 

    $this->photos->add($photos); 

    return $this; 
} 

/** 
* Remove photos 
* 
* @param \VDKP\Site\BackendBundle\Entity\Photo $photos 
*/ 
public function removePhoto(\VDKP\Site\BackendBundle\Entity\Photo $photos) 
{ 
    $this->photos->removeElement($photos); 
} 

/** 
* Get photos 
* 
* @return \Doctrine\Common\Collections\Collection 
*/ 
public function getPhotos() 
{ 
    return $this->photos; 
} 

Photo.php

/** 
* @ORM\ManyToOne(targetEntity="Good", inversedBy="photos") 
* @ORM\JoinColumn(name="good_id", referencedColumnName="id") 
**/ 
private $good; 

GoodController，updateACtion：

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

    $entity = $em->getRepository('VDKPSiteBackendBundle:Good')->find($id); 

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

    $originalPhotos = new \Doctrine\Common\Collections\ArrayCollection(); 

    foreach ($entity->getPhotos() as $photo) { 
     $originalPhotos->add($photo); 
    } 

    $editForm = $this->createEditForm($entity); 

    $editForm->handleRequest($request); 

    if ($editForm->isValid()) { 


     foreach ($originalPhotos as $photo) { 
      if (false === $entity->getPhotos()->contains($photo)) { 
       $photo->setGood(null); 

       $em->persist($photo);     
      } 
     } 

     $em->persist($entity); 
     $em->flush(); 
    } 

    return $this->redirect($this->generateUrl('good_edit', array('id' => $id))); 

    return array(
     'entity'  => $entity, 
     'edit_form' => $editForm->createView(), 
     'delete_form' => $deleteForm->createView(), 
    ); 

} 

我做的一切书面文件here英寸

对不起，我的英语。感谢您的帮助。

Answer 1

它看起来像你错过了文档的这一部分：

foreach ($originalTags as $tag) { 
    if (false === $task->getTags()->contains($tag)) { 
     // remove the Task from the Tag 
     $tag->getTasks()->removeElement($task); 

     // if it was a many-to-one relationship, remove the relationship like this 
     // $tag->setTask(null); 

     $em->persist($tag); 

     // if you wanted to delete the Tag entirely, you can also do that 
     // $em->remove($tag); 
    } 
} 

所以，我认为你必须与你的数据类型类似的东西：好和照片。

Answer 2

我认为，文件是不准确的，因为：

在这部分代码：

$originalTags = new ArrayCollection(); 

// Create an ArrayCollection of the current Tag objects in the database 
foreach ($task->getTags() as $tag) { 
    $originalTags->add($tag); 
} 

我们收集的标签，这与数据库中的当前任务的关系。

在这部分代码：

foreach ($originalTags as $tag) { 
    if (false === $task->getTags()->contains($tag)) { 
     // remove the Task from the Tag 
     $tag->getTasks()->removeElement($task); 

     // if it was a many-to-one relationship, remove the relationship like this 
     // $tag->setTask(null); 

     $em->persist($tag); 

     // if you wanted to delete the Tag entirely, you can also do that 
     // $em->remove($tag); 
    } 
} 

我们必须比较$请求数据和$ originalTags阵列数据。但是，我们将$ originalTags与$ task-> getTags（）进行了比较，后者基本相同。