mysql - 多对多 + WHERE 字段 <> 值

Question

我有“Post”实体，其关系为manyToMany

 /**
 * @ORM\ManyToMany(targetEntity="Core\CoreBundle\Entity\User", cascade={"persist", "remove", "merge"})
 * @ORM\JoinTable(name="blogregion_post_views")
 */
protected $views;

 /**
 * @ORM\ManyToMany(targetEntity="Application\BlogRegionBundle\Entity\PostTag", cascade={"persist", "remove", "merge"})
 * @ORM\JoinTable(name="blogregion_tags_match")
 */
protected $tags;

我想获得新帖子

    $query = $this->getEm()->createQuery("
        SELECT p FROM BlogRegionBundle:Post p LEFT JOIN p.tags t LEFT JOIN p.views v
        WHERE t.id = :blogId AND p.state = :state AND p.deleted = 0 AND (v <> :user OR v IS NULL )

    ")
        ->setParameter('blogId', $blogId)
        ->setParameter('state', 1)
        ->setParameter('user', $this->getUser())
    ;

但如果我的用户存在于“views”关系中，它会返回“Post”

如何解决这个问题？

Answer 1

您可以尝试使用 MEMBER OF 条件。

SELECT p FROM BlogRegionBundle:Post p LEFT JOIN p.tags t WHERE t.id = :blogId AND p.state = :state AND p.deleted = 0 AND :user NOT MEMBER OF p.views

来自http://docs.doctrine-project.org/en/latest/reference/dql-doctrine-query-language.html#dql-select-examples