原则:额外的关系(多对多）

这是我的第一个问题，所以我希望我能按照它应该做的做每件事。

我有两个具有多对多关系的学说实体，这很好，但我也想在多对多表上添加一个额外的检查。问题是在DQL中，我无法访问正确的列。

我想到了两种可能性：抽象父类或原生查询。我将粘贴下面的本地查询，但这不是我所希望的，因为我们必须复制并粘贴它。

所以我想使关系+类型。因此，对于这个例子，我还需要检查类型="Gallery"

gallery_object（表）
id，标记，已删除
1，赞助商，0

media_relations（表）
id，mediaid，type，typeId
1，37，画廊，1

媒体文件
id，userid，filename，filepath，filesize，mime_type，date，deleted
37,4533882_10151332524797037_1940030593_n_20.jpg，/resources/upload/www/，82724，image/jpeg，2013-01-25 15:04:46，0

$rsm = new ResultSetMapping;
$rsm->addEntityResult(Helper::getNamespace('Gallery', 'Models/Entities') . "Object", 'o')
    ->addFieldResult('o', 'id', 'id')
    ->addFieldResult('o', 'tag', 'tag')
    ->addFieldResult('o', 'deleted', 'deleted')
    ->addJoinedEntityResult(ltrim(Helper::getNamespace('Media', 'Models/Entities') . "Media", ''''), 'm', 'o', 'file')
    ->addFieldResult('o', 'file', 'id')
    ->addFieldResult('m', 'mid', 'id')
    ->addFieldResult('m', 'user', 'userid')
    ->addFieldResult('m', 'filename', 'filename')
    ->addFieldResult('m', 'filepath', 'filepath')
    ->addFieldResult('m', 'filesize', 'filesize')
    ->addFieldResult('m', 'mime_type', 'mime_type')
    ->addFieldResult('m', 'date', 'date')
    ->addFieldResult('m', 'mdeleted', 'deleted');
$sql = "SELECT o.id AS oid, m.id as file, o.tag, o.deleted, m.id AS mid, m.userid, m.filename, m.filepath, m.filesize, m.mime_type, m.date, m.deleted as mdeleted
    FROM gallery_object as o
        INNER JOIN media_relations mr ON (mr.typeid = o.id AND mr.type = 'Gallery')
        INNER JOIN media_files m ON (mr.mediaid = m.id)";
$result = $this->_em->createNativeQuery($sql, $rsm)->getResult();
return $result;

实体看起来像

/**
 * Media entity
 *
 * @Entity(repositoryClass = "iTet'Application'Modules'Media'Models'Repositories'Media")
 * @Table(name="media_files")
 * @author Stephen Fenne
 */
class Media
{
/**
 * @Id
 * @Column(type="integer")
 * @GeneratedValue
 * @var int
 */
protected $id;
/**
 * @ManyToOne(targetEntity="iTet'Application'Modules'Core'User'Models'Entities'User")
 * @JoinColumn(name="userId", referencedColumnName="id")
 * @var int
 */
protected $user;
/**
 * @Column(length = 100)
 * @var string
 */
protected $filename;
/**
 * @Column
 * @var string
 */
protected $filepath;
/**
 * @Column(type = "integer")
 * @var int
 */
protected $filesize;
/**
 * @Column
 * @var string
 */
protected $mime_type;
/**
 * @Column(type = "datetime", nullable=true)
 * @var 'DateTime 
 */
protected $date;
/**
 * @Column(type = "integer")
 * @var int
 */
protected $deleted = false;

--

/**
 *
 * @Entity(repositoryClass="iTet'Application'Modules'Gallery'Models'Repositories'Object")
 * @Table(name="gallery_object")
 * @author Ward Peeters <ward@coding-tech.com>
 * @package
 */
class Object
{
/** @Id
 * @Column(type="integer")
 * @GeneratedValue
 * @var int */
protected $id;
/** @ManyToMany(targetEntity="iTet'Application'Modules'Media'Models'Entities'Media")
 * @JoinTable(name="media_relations",
 *   joinColumns={@JoinColumn(name="typeid", referencedColumnName="id")},
 *   inverseJoinColumns={@JoinColumn(name="mediaid", referencedColumnName="id")}
 * )
 * @var Media */
protected $file;
/** @Column
 * @var string */
protected $tag;
/** @Column(type="integer")
 * @var bool */
protected $deleted = false;