Symfony2表单集合：如何从集合中删除实体？ [英] Symfony2 form collection: How to remove entity from a collection?

问题描述

我尝试从集合中删除实体，但它不起作用。

我认为我在某处有个错误，但我不知道在哪里。

我的 updateAction ：

  $ em = $ this-> getDoctrine ） - > getEntityManager（）; 
 
 $ entity = new Person（）; 
 
 if（！$ entity）{
 throw $ this-> createNotFoundException（'Unable to find Person entity。'）; 
} 
 
 $ editForm = $ this-> createForm（new PersonType（），$ entity）; 
 $ deleteForm = $ this-> createDeleteForm（$ id）; 
 
 $ request = $ this-> getRequest（）; 
 
 $ editForm-> bindRequest（$ request）; 
 
 if（$ editForm-> isValid（））{
 $ entity = $ editForm-> getData（）; 
 
 $ em-> persist（$ entity）; 
 foreach（$ entity-> getAddresses（）as $ address）
 {
 $ em-> persist（$ address）; 
} 
 $ em-> flush（）; 
 
 return $ this-> redirect（$ this-> generateUrl（'person_show'，array（'id'=> $ id）））; 
 
 $ b $ return $ this-> render（'AppPersonBundle：Person：edit.html.twig'，array（
'entity'=> $ entity，
'edit_form'=> $ editForm-> createView（），
'delete_form'=> $ deleteForm-> createView（），
 $ b $; 
  

请注意，要删除我的实体，请从html中删除div。

我的意思是，例如，我删除了< div id =myapp_personbundle_persontype_address_4> 。

它是正确的方式？

解决方案

现在，我做：

 $ deleteForm = $ this-> createDeleteForm（$ id）; 
 
 $ previousCollections = array（
'addresses'=> $ entity-> getAddresses（），
）; 
 
 $ request = $ this-> getRequest（）; 
 $ editForm-> bindReq （$请求）; 
 
 if（$ editForm-> isValid（））{
 $ entity = $ editForm-> getData（）; 
 
 $ this-> deleteCollections（$ em，$ previousCollections，$ entity）; 
 
 $ em-> persist（$ entity）; 
 foreach（$ entity-> getAddresses（）as $ address）
 {
 $ em-> persist（$ address）; 
} 
 $ em-> flush（）; 
 
 return $ this-> redirect（$ this-> generateUrl（'person_show'，array（'id'=> $ id）））; 
} 
 [...] 
} 
 
私有函数deleteCollections（$ em，$ init，$ final）
 {
 if （空（$ init））{
 return; 
 
 
 if（！$ final-> getAddresses（）instanceof \Doctrine\ORM\PersistentCollection）{
 foreach（$ init ['addresses'] as $ addr）{
 $ em-> remove（$ addr）; 
} 
} 
} 
  

我希望有一个解决方案通过 https://github.com/symfony/symfony/issues/1540，但它很慢找到。

I try to remove entities from a collection but it doesn't work.

I think I have a mistake somewhere, but I don't know where.

Here the code from my updateAction:

    $em = $this->getDoctrine()->getEntityManager();

    $entity = new Person();

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

    $editForm   = $this->createForm(new PersonType(), $entity);
    $deleteForm = $this->createDeleteForm($id);

    $request = $this->getRequest();

    $editForm->bindRequest($request);

    if ($editForm->isValid()) {
        $entity = $editForm->getData();

        $em->persist($entity);
        foreach($entity->getAddresses() as $address)
        {               
            $em->persist($address);
        }
        $em->flush();                                 

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

    return $this->render('AppPersonBundle:Person:edit.html.twig', array(
        'entity'      => $entity,
        'edit_form'   => $editForm->createView(),
        'delete_form' => $deleteForm->createView(),

    );

Note that to remove my entity I remove the div from the html.

I mean I remove <div id="myapp_personbundle_persontype_address_4"> for example.

Is it the right way?

解决方案

For now, i do :

    [...]        
    $editForm   = $this->createForm(new PersonType(), $entity);
    $deleteForm = $this->createDeleteForm($id);

    $previousCollections = array(
        'addresses' => $entity->getAddresses(),
    );        

    $request = $this->getRequest();
    $editForm->bindRequest($request);

    if ($editForm->isValid()) {
        $entity = $editForm->getData();

        $this->deleteCollections($em, $previousCollections, $entity);

        $em->persist($entity);
        foreach($entity->getAddresses() as $address)
        {               
            $em->persist($address);
        }
        $em->flush();                                 

        return $this->redirect($this->generateUrl('person_show', array('id' => $id)));
    }
    [...]
}

private function deleteCollections($em, $init, $final)
{
    if (empty($init)) {
        return;
    }

    if (!$final->getAddresses() instanceof \Doctrine\ORM\PersistentCollection) {
        foreach ($init['addresses'] as $addr) {
            $em->remove($addr);
        }
    }
}

And I hope a solution will be found one day with https://github.com/symfony/symfony/issues/1540, but it slow to be found.

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