Synfony2 - 创建和编辑表单不持久关联

Question

我是初学者，我不知道如何解决我的问题。

我有一个 ManyToOne/OneToMany 关联，并且在表单类型中添加了一个字段，但句柄请求在创建或编辑中都没有考虑该关联。

如何继续保存我的关联？

这是我的视频控制器

<?php
class VideoController extends Controller
{
... 
/**
 * Creates a new Video entity.
 *
 * @Route("/new", name="video_new")
 * @Method({"GET", "POST"})
 */
public function newAction(Request $request)
{
    $video = new Video();
    $form = $this->createForm('AppBundleFormVideoType', $video);
    $form->handleRequest($request);
    if ($form->isSubmitted() && $form->isValid()) {
        $em = $this->getDoctrine()->getManager();
        $em->persist($video);
        $em->flush();
        return $this->redirectToRoute('video_show', array('id' => $video->getId()));
    }
    return $this->render('video/new.html.twig', array(
        'video' => $video,
        'form' => $form->createView(),
    ));
}
/**
 * Displays a form to edit an existing Video entity.
 *
 * @Route("/{id}/edit", name="video_edit")
 * @Method({"GET", "POST"})
 */
public function editAction(Request $request, Video $video)
{
    $deleteForm = $this->createDeleteForm($video);
    $editForm = $this->createForm('AppBundleFormVideoType', $video);
    $editForm->handleRequest($request);
    if ($editForm->isSubmitted() && $editForm->isValid()) {
        $em = $this->getDoctrine()->getManager();
        $em->persist($video);
        $em->flush();
        return $this->redirectToRoute('video_edit', array('id' => $video->getId()));
    }
    return $this->render('video/edit.html.twig', array(
        'video' => $video,
        'edit_form' => $editForm->createView(),
        'delete_form' => $deleteForm->createView(),
    ));
}
...
}

现在是 JT 实体

namespace AppBundleEntity;
use DoctrineCommonCollectionsArrayCollection;
/**
 * JT
 *
 * @ORMTable(name="j_t")
 * @ORMEntity(repositoryClass="AppBundleRepositoryJTRepository")
 */
class JT
{
 ...
/**
 * @ORMOneToMany(targetEntity="Video", mappedBy="jT")
 */
private $videos;
public function __construct()
{
    $this->products = new ArrayCollection();
}
/**
 * Add videos
 *
 * @param AppBundleEntityVideo $videos
 * @return JT
 */
public function addVideo(AppBundleEntityVideo $videos)
{
    $this->videos[] = $videos;
    return $this;
}
/**
 * Remove videos
 *
 * @param AppBundleEntityVideo $videos
 */
public function removeVideo(AppBundleEntityVideo $videos)
{
    $this->videos->removeElement($videos);
}
/**
 * Get videos
 *
 * @return DoctrineCommonCollectionsCollection
 */
public function getVideos()
{
    return $this->videos;
}
} 

视频实体

namespace AppBundleEntity;
use DoctrineORMMapping as ORM;
/**
 * Video
 *
 * @ORMTable(name="video")
 * @ORMEntity(repositoryClass="AppBundleRepositoryVideoRepository")
 */
class Video
{
    ....
          /**
         * @ORMManyToOne(targetEntity="JT", inversedBy="videos")
     * @ORMJoinColumn(name="jT_id", referencedColumnName="id")
     */
    private $jT;

    /**
     * Set jT
     *
     * @param AppBundleEntityJT $jT
     * @return Video
     */
    public function setJT(AppBundleEntityJT $jT = null)
    {
        $this->jT = $jT;
        return $this;
    }
    /**
     * Get jT
     *
     * @return AppBundleEntityJT
     */
    public function getJT()
    {
        return $this->jT;
    }

    /**
     * toString
     * @return string
     */
    public function __toString()
    {
        return $this->getTitle();
    }
}

最后，视频类型表单

class VideoType extends AbstractType
{
/**
 * @param FormBuilderInterface $builder
 * @param array $options
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ...
        ->add('jT','entity'
                       ,array("label"=>"JT",
                              'label_attr' => array('class' => 'control-label'),
                              'class' => 'AppBundle:JT',
                              "attr"=>array("class"=>"form-control")
                      )
              );

}

我希望能够从视频形式中选择"视频"是否属于"jT"，以及哪一个。

PS：如何在表单的实体输入中添加"无"选项？

Answer 1

您有 2 个选项：

-- 显式保存 jT 实体

$jT = $video->getJT();
$jT->addVideo($video);
$em->persist($jT);
$em->persist($video);
$em->flush();

-- 为级联持久配置实体

/**
 * @ORMManyToOne(targetEntity="JT", inversedBy="videos", cascade={"all"})
 * @ORMJoinColumn(name="jT_id", referencedColumnName="id")
 */
private $jT;
public function setJT(JT $jT)
{
   $this->jT = $jT;
   $jT->addVideo($this)
   return $this;
}
/**
 * @ORMOneToMany(targetEntity="Video", mappedBy="jT", cascade={"all"})
 */
private $videos;

后者的学说描述：http://doctrine-orm.readthedocs.io/projects/doctrine-orm/en/latest/reference/working-with-associations.html#association-management-methods