在Symfony2中保存多对多关系到数据库

Question

在我的Symfony2项目中,我有两个相关的实体:用户和收藏夹.他们有多对多的关系.

我的应用程序的工作原理如下:在我的Twig页面中,我有一些带有"添加到收藏夹"按钮的项目.当您单击按钮时,我的控制器将item_id保存在"收藏夹"列中.但后来我想保存将项目添加到他的收藏夹的用户,这里我的应用程序失败了.

用户和收藏夹存在但用户和收藏夹之间的连接列仍为空.我也没有收到任何错误.

这是我的代码:

实体用户

class Users implements AdvancedUserInterface
{
    /**
     * @var \Doctrine\Common\Collections\ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Favorites", inversedBy="user", cascade={"persist"})
     * @ORM\JoinTable(name="user_has_favorite",
     *   joinColumns={
     *     @ORM\JoinColumn(name="user_id", referencedColumnName="user_id")
     *   },
     *   inverseJoinColumns={
     *     @ORM\JoinColumn(name="favorite_id", referencedColumnName="favorite_id")
     *   }
     * )
     */
    private $favorite;

    public function __construct()
    {
        $this->favorite = new \Doctrine\Common\Collections\ArrayCollection();
    }

    public function addFavorite(\Geo\CityTroopersBundle\Entity\Favorites $favorite)
    {
        $this->favorite[] = $favorite;

        return $this;
    }
...

实体收藏夹

class Favorites
{

    /**
     * @var \Doctrine\Common\Collections\ArrayCollection
     *
     * @ORM\ManyToMany(targetEntity="Users", mappedBy="favorite", cascade={"persist"})
     */
    private $user;

    public function __construct()
    {
        $this->user = new \Doctrine\Common\Collections\ArrayCollection();
    }
    public function addUser(\Geo\CityTroopersBundle\Entity\Users $user)
    {
        $this->user[] = $user;    
        return $this;
    }

我的控制器

public function showNewsAction()
    {
        $request = $this->get('request');    
        $itemId=$request->request->get('itemId');
        if($itemId != NULL)
        {
        //MAKE NEW FAVORITE AND ADD TO DATABASE LINKED WITH ITEM
        $favorite = new Favorites();
        $favorite->setItemId($itemId);

         //LINK FAVORITE ID WITH USER ID IN JOINCOLUMN
        $userId = 6;
        $em = $this->getDoctrine()->getEntityManager();

        $user = $em->getRepository('GeoCityTroopersBundle:Users')->find($userId);

        $favorite->addUser($user);
        $em->persist($favorite); 

        //I TRIED THIS TOO, BUT IT FAILED
        /*$user->addFavorite($favorite);
        $em->persist($user);*/

        $em->flush();

Answer 1

你在那附近.对于doctrine多对多关系,您需要调用两个add方法

$favorite->addUser($user);
$user->addFavorite($favorite);

$em->persist($favorite); 
$em->persist($user);
$em->flush();

这应该可以解决问题.在文档中他们这样做,但是没有明确提及它.不知道为什么要么因为很多人遇到这个(包括我自己).

Answer 2

如此处所述,只有拥有方负责连接管理:http: //doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#owning-and-inverse-side-on-a -manytomany关联

所以只有

$user->addFavorite($favorite);

应该坚持,而不是

$favorite->addUser($user);