Question

我在symfony3中有一个简单的应用程序。我尝试为我的实体获取适当的标签，但我遇到了问题。

我的标签实体有一部分：

/**
 * Tag
 *
 * @ORM\Table(name="tag")
 * @ORM\Entity(repositoryClass="AppBundle\Repository\TagRepository")
 */
class Tag
{
    .
    .
    .

    /**
     * @ORM\ManyToMany(targetEntity="Note", mappedBy="tags")
     */
    private $notes;

...并且有一部分注释实体：

/**
 * Note
 *
 * @ORM\Table(name="note")
 * @ORM\Entity(repositoryClass="AppBundle\Repository\NoteRepository")
 */
class Note
{
     .
     .
     .

    /**
     * @ORM\ManyToMany(targetEntity="Tag", inversedBy="notes", cascade={"persist"})
     * @ORM\JoinTable(name="notes_tags")
     */
    private $tags;

在我的存储库类中，我调用：

if(!empty($data['tags'])) {
    $query->andWhere('n.tags = :tag')->setParameter('tag', 6);
}

...然后结果是：

[Semantical Error] line 0, col 46 near 'tags = :tag ORDER': Error: Invalid PathExpression. StateFieldPathExpression or SingleValuedAssociationField expected.

我在Symfony 2和Doctrine中真的很新，所以我需要你的帮助。

Answer 1

首先，恕我直言，你需要在课堂上改变注意inversedBy到“注释”。另外，请确保您的代码看起来像http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/association-mapping.html#many-to-many-bidirectional

Answer 2

我找到了一个解决方案，我必须使用MEMBER OF子句：

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与symfony3以多对多关系获取关联数据的语义错误

2 个答案: