Doctrine2 ORM 访问多对多连接表

Question

对我上一个问题的跟进

Doctrine2 ORM OneToOne not working UPDATE changed to ManyToMany but not fully working.

我接受了给出的非常有用的答案，因为它为我指明了正确的方向。不幸的是，我很难让其余的工作正常进行，但是由于问题太长且令人困惑，我开始了一个新问题。

我有一个用户可以在其中写广告的页面。用户还可以将希望稍后在其用户部分看到的广告添加为书签。

我有 3 个数据库表

advert (id, advert_title....)
user (id, user_name....)
bookmarks (advert_id, user_id)

按照我之前的问题中的建议，我创建了 2 个实体，广告和用户实体（见下文）

Advert.php

namespace Advert\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
use DateTime;
use Zend\Stdlib\ArrayObject;

/** Advert
 * 
 * @ORM\Table(name="advert")
 * @ORM\Entity(repositoryClass="Advert\Repository\AdvertRepository")
 */

class Advert
{
/**
 * @var integer
 * @ORM\Column(name="id", type="integer", nullable=false)
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="IDENTITY")
 */
     private $id;

/**
 * @ORM\ManyToMany(targetEntity="Advert\Entity\User", mappedBy="bookmarks", cascade={"persist"})
 * @ORM\JoinTable(name="bookmarks",
 *      joinColumns={@ORM\JoinColumn(name="advert_id", referencedColumnName="id")},
 *      inverseJoinColumns={@ORM\JoinColumn(name="user_id", referencedColumnName="id")}
 *      )
 */
    private $bookmarks;


    public function __construct() 
    { 
        $this->categories = new ArrayCollection();
        $this->images = new ArrayCollection();
        $this->advertCreated = new \DateTime("now");
    }

/** 
 * Set ID 
 * 
 * @param integer $id 
 * @return Advert 
 */ 
    public function setId($id) 
    { 
        $this->id = $id; 
        return $this; 
    }

/**
 * Get id
 *
 * @return integer 
 */
    public function getId()
    {
        return $this->id;
    }

 /**
 * Set bookmark
 *
 * @param  $bookmark
 * @return bookmark
 */
    public function setBookmark($bookmark)
    {
        $this->bookmark = $bookmark;
        return $this;
    }


/**
 * Get bookmark
 *
 * @return ArrayCollection
 */
    public function getBookmark()
    {
        return $this->bookmarks;
    }


/**
 * @param Collection $bookmark
 */
    public function addBookmark($bookmarks)
    {
        $this->bookmarks->add($bookmarks);
    }

/**
 * @param Collection $bookmark
 */
    public function removeBookmark($bookmarks)
    {
        $this->bookmarks->removeElement($bookmarks);     
    }
}

User.php

namespace Advert\Entity;

use Doctrine\ORM\Mapping as ORM;
use ZfcUser\Entity\User as ZfcUser;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;


/**
 * User
 * @ORM\Table(name="user")
 * @ORM\Entity(repositoryClass="Advert\Repository\UserRepository")
 */

class User extends ZfcUser
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer", nullable=false)
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="IDENTITY")
 */
protected $id;

/**
 * @ORM\ManyToMany(targetEntity="Advert\Entity\Advert", inversedBy="bookmarks", cascade={"persist"})
 * @ORM\JoinTable(name="bookmarks",
 *      joinColumns={@ORM\JoinColumn(name="user_id", referencedColumnName="id")},
 *      inverseJoinColumns={@ORM\JoinColumn(name="advert_id", referencedColumnName="id")}
 *      )
 */
 private $bookmarks;


public function __construct()
{
    $this->bookmarks = new ArrayCollection();  
}

public function getBookmarks() {
     return $this->bookmarks;
}

/**
* @param Collection $bookmarks
*/
public function addBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->bookmarks->add($bookmark);
   }
}

/**
 * @param Collection $bookmarks
 */
public function removeBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->bookmarks->removeElement($bookmark);
   }
}  
}

我现在有一项服务来检查广告是否已被添加书签、删除书签或设置书签。这意味着我必须将 UserId 和 AdvertId 直接输入到加入表书签中。但是，如果我没有带有 setUserId 和 setAdvertId 的书签实体，我该怎么做？

到目前为止，这是我的服务，最后两种方法（保存和删除）显示了我在删除书签实体之前使用的内容。我现在如何阅读联接表以检查书签是否已经存在，以便检查 userId 和 advertId？再说一次，我将如何访问此表以直接删除书签？如果所有者删除了广告，则书签将被删除，这很好，但显然用户还需要能够只删除一个书签。我如何做到这一点？

BookmarkAdvertService.php

public function checkAdvertBookmarkStatus($advertId)
{
    $userId = $this->getUserEntity()->getId();  
    $advert = $this->getEntityManager()->find('Advert\Entity\Advert', $advertId);
    $bookmarkStatus= $advert->getBookmark();
    return $bookmarkStatus;
}

public function saveAdvertBookmark($advertId)
{
    //this is what I used before
    $bookmark = new BookmarkEntity();
    $userId = $this->getUserEntity()->getId();

    // $bookmark->addBookmark($advertId); ??? like this
    $bookmark->setAdvertId($advertId);
    $bookmark->setUserId($userId);

    # write new bookmmark to database tbl bookmark
    $this->getEntityManager()->persist($bookmark);
    $this->getEntityManager()->flush();
}


public function removeAdvertBookmark($advertId)
{
    // this is what I used before
    $userId = $this->getUserEntity()->getId();
    $bookmark = $this->getEntityManager()->getRepository('Advert\Entity\Bookmark')
                                         ->findOneBy(array('advertId' => $advertId, 'userId' => $userId));

    # remove bookmmark from tbl bookmark
    $this->getEntityManager()->remove($bookmark);
    $this->getEntityManager()->flush();
}

更新 1 不起作用

我收到 2 条错误消息：

get_class() expects parameter 1 to be object, string given

vendor\doctrine\common\lib\Doctrine\Common\Persistence\Mapping\MappingException.php:96

Message:

Class '' does not exist

广告\服务\书签广告服务.php

class BookmarkAdvertService 
{

  public function saveAdvertBookmark($advert)
  {
    $user = $this->getUserEntity()->getId(); 

    # create a new, empty entity
    $bookmark = new \Advert\Entity\Bookmark();
    $bookmark->setUser($user);
    $bookmark->setAdvert($advert);
     # write new bookmmark to database tbl bookmark
    $this->getEntityManager()->persist($bookmark);
    $this->getEntityManager()->flush();
  }

广告/实体/Bookmark.php

namespace Advert\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\Collection;

/** Bookmark
 * 
 * @ORM\Table(name="bookmarks")
 * @ORM\Entity(repositoryClass="Advert\Repository\BookmarkRepository")
 */
class Bookmark
{
/**
 * @ORM\Id
 * @ORM\ManyToOne(targetEntity="Advert\Entity\Advert", inversedBy="bookmark")
 * @ORM\JoinColumn(name="advert_id", referencedColumnName="id")
 */
private $advert;

/** 
 * @ORM\Id
 * @ORM\ManyToOne(targetEntity="Advert\Entity\User", inversedBy="bookmark")
 * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
 */
private $user;


public function setAdvert($advert)
{
    $this->advert = $advert;
    return $this;
}

public function getAdvert()
{
    return $this->advert;
}


public function setUser($user)
{
    $this->user = $user;
    return $this;
}

public function getUser()
{
    return $this->user;
}    
}

广告\实体\广告.php

namespace Advert\Entity;
use Advert\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
/** Advert
 * 
 * @ORM\Table(name="advert")
 * @ORM\Entity(repositoryClass="Advert\Repository\AdvertRepository")
 */
class Advert
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer", nullable=false)
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="IDENTITY")
 */
private $id;

/**
 * @ORM\OneToMany(targetEntity="Bookmark", mappedBy="advert", cascade={"persist", "remove"})
 * @ORM\JoinColumn(name="advert_id", referencedColumnName="id")
 */
private $bookmarks;

public function setBookmark($bookmark)
{
    $this->bookmark = $bookmark;
    return $this;
}


/**
 * Get bookmark
 *
 * @return ArrayCollection
 */
public function getBookmarks()
{
    return $this->bookmarks;
}

/**
 * @param Collection $bookmarks
 */
public function removeBookmarks(Collection $bookmarks)
{
  foreach ($bookmarks as $bookmark) {
    $this->bookmarks->removeElement($bookmark);
}
}

广告\实体\用户.php

namespace Advert\Entity;

use Doctrine\ORM\Mapping as ORM;
use ZfcUser\Entity\User as ZfcUser;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;

/**
 * User
 *
 * @ORM\Table(name="user")
 * @ORM\Entity(repositoryClass="Advert\Repository\UserRepository")
 */

class User extends ZfcUser
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer", nullable=false)
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="IDENTITY")
 */
 protected $id;

 /**
 * @ORM\OneToMany(targetEntity="Bookmark", mappedBy="user", cascade={"persist", "remove"})
 * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
 */
private $bookmarks;


public function __construct()
{
    $this->bookmarks = new ArrayCollection();
}


public function getBookmarks() 
{
     return $this->bookmarks;
}

/**
* @param Collection $bookmarks
*/
public function addBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->bookmarks->add($bookmark);
   }
}

/**
* @param Collection $bookmarks
*/
public function removeBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->bookmarks->removeElement($bookmark);
   }
}

更新 2 工作中

public function saveAdvertBookmark($advertId)
{
    $userId = $this->getUserEntity()->getId(); 
    $user = $this->getEntityManager()->find('Advert\Entity\User', $userId);
    $advert = $this->getEntityManager()->find('Advert\Entity\Advert', $advertId);
     # create a new, empty entity
    $bookmark = new \Advert\Entity\Bookmark();
    $bookmark->setUser($user);
    $bookmark->setAdvert($advert);
     # write new bookmmark to database tbl bookmark
    $this->getEntityManager()->persist($bookmark);
    $this->getEntityManager()->flush();
}


public function removeAdvertBookmark($advert)
{
    $user = $this->getUserEntity()->getId();  
    $advert = $this->getEntityManager()->getRepository('Advert\Entity\Bookmark')
                                         ->findOneBy(array('advert' => $advert, 'user' => $user));
    if ($advert !== NULL){

         # write new bookmmark to database tbl bookmark
        $this->getEntityManager()->remove($advert);
        $this->getEntityManager()->flush();
    }else{
        return false;
    }
}

Answer 1

您的映射似乎有误。 在我看来，您的书签本身也是一个实体。该实体有一个User 和一个Advert。这两者结合起来创建了一个复合键。

所以从User 到Bookmark 的关系是一对多的。并为用户多对一添加书签。

从Advert 到Bookmark 的关系是一对多的，从Bookmark 到Advert 是多对一的。

您的Bookmark 实体应如下所示：

class Bookmark
{
    /**
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity="Advert\Entity\Advert", inversedBy="bookmarks")
     * @ORM\JoinColumn(name="advert_id", referencedColumnName="id")
     */
    private $advert;

    /** 
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity="User\Entity\User", inversedBy="bookmarks")
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
     */
    private $user;

    /**
     * @param Advert $advert
     * @return self
     */
    public function setAdvert(Advert $advert)
    {
        $this->advert = $advert;
        $advert->addBookMark($this);
        return $this;
    }

    /**
     * @return Advert
     */
    public function getAdvert()
    {
        return $this->advert;
    }

    /**
     * @param User $user
     * @return self
     */
    public function setUser(User $user)
    {
        $this->user = $user;
        $user->addBookMark($this);
        return $this;
    }

    /**
     * @return User
     */
    public function getUser()
    {
        return $this->user;
    }    
}

然后在你的User:

/**
 * @ORM\OneToMany(targetEntity="Advert\Entity\BookMark", mappedBy="user", cascade={"remove"})
 */
 private $bookmarks;

/**
 * @return Collection
 */
public function getBookmarks() 
{
     return $this->bookmarks;
}

/**
 * @param BookMark $bookmark
 */
public function addBookmark(BookMark $bookmark)
{
   $this->bookmarks->add($bookmark);
}

/**
 * @param Collection $bookmarks
 */
public function addBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->addBookMark($bookmark);
   }
}

/**
 * @param BookMark $bookmark
 */
public function removeBookmark(BookMark $bookmark)
{
   $this->bookmarks->removeElement($bookmark);
}

/**
 * @param Collection $bookmarks
 */
public function removeBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->removeBookmark($bookmark);
   }
}

在你的Advert:

/**
 * @ORM\OneToMany(targetEntity="Advert\Entity\BookMark", mappedBy="advert", cascade={"remove"})
 */
 private $bookmarks;

/**
 * @return Collection
 */
public function getBookmarks() 
{
     return $this->bookmarks;
}

/**
 * @param BookMark $bookmark
 */
public function addBookmark(BookMark $bookmark)
{
   $this->bookmarks->add($bookmark);
}

/**
 * @param Collection $bookmarks
 */
public function addBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->addBookMark($bookmark);
   }
}

/**
 * @param BookMark $bookmark
 */
public function removeBookmark(BookMark $bookmark)
{
   $this->bookmarks->removeElement($bookmark);
}

/**
 * @param Collection $bookmarks
 */
public function removeBookmarks(Collection $bookmarks)
{
   foreach ($bookmarks as $bookmark) {
       $this->removeBookmark($bookmark);
   }
}

为您服务：

/**
 * @param int $advertId
 */
public function saveAdvertBookmark($advertId)
{
    $entityManager = $this->getEntityManager():
    $user = $this->getUserEntity(); 

    $advert = $entityManager->find('Advert\Entity\Advert', $advertId):
    $bookmark = new \Advert\Entity\Bookmark();
    $bookmark->setUser($user);
    $bookmark->setAdvert($advert);

    $entityManager->persist($bookmark);
    $entityManager->flush();
}

要在删除 User 或 Advert 时删除所有书签，只需在这些实体中的书签关系中添加 cascade={"remove"}。