我们可以使用traits来映射manyToOne与doctrine2的关系吗？ [英] can we use traits to map manyToOne relationship with doctrine2?

问题描述

我经常将其他人的投票实体与symfony2 / doctrine2相关联。这是通过manyToOne关系完成的。

我正在考虑使用特征来包含该协会和其他实体的getter / setter，但是后来我遇到了无法正确替换mappedBy参数的问题。

如果没有办法给出参数一个特质，我还能如何实现我的目标，知道我不能扩展另一个班级。

示例：

  / ** 
 * @ ORM\OneToMany（targetEntity =\AppBundle\Entity\Social\Vote，mappedBy =post）
 * / 
 private $ votes; 
  

以前的映射适用于一个邮政实体。但是如果我把它放在一个特征中并在注释实体中使用trait，那么我怎么可以将mappedBy属性从post更改为comment？

非常感谢！ p>

解决方案

是的，您可以覆盖与

  * @AssociationOverrides（{
 * @AssociationOverride（name =bar，
 * joinColumns = @ JoinColumn（
 * name =example_entity_overridden_​​bar_id，referencedColumnName =id
 *）
 *）
 *}）
  

http：// doctrine-orm .readthedocs.org / en / latest / tutorials / override-field-association-mappings-in-subclasses.html

I am frequently associating a vote entity in other ones with symfony2 / doctrine 2. This is done through a manyToOne relationship.

I was considering using a trait to include the association and its getters/setters in other entities but then I faced the issue that the mappedBy parameter couldn't be replaced correctly.

If there is no way to give arguments to a trait, how else could I achieve my objective, knowing I can't extend another class.

Example :

/**
 * @ORM\OneToMany(targetEntity="\AppBundle\Entity\Social\Vote", mappedBy="post")
 */
private $votes;

The previous mapping works fine for a post entity. but if I put it in a trait and use the trait in a Comment entity, how can I change the mappedBy attribute from post to comment ?

Thanks a lot!

解决方案

Yes you can override associations with

 * @AssociationOverrides({
 *      @AssociationOverride(name="bar",
 *          joinColumns=@JoinColumn(
 *              name="example_entity_overridden_bar_id", referencedColumnName="id"
 *          )
 *      )
 * })

Have a look at http://doctrine-orm.readthedocs.org/en/latest/tutorials/override-field-association-mappings-in-subclasses.html

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