如何从实体获取 Respository? [英] How to get a Respository from an Entity?

问题描述

我有一个名为 Game 的实体和一个名为 GameRepository 的相关存储库:

I have an Entity called Game with a related Repository called GameRepository:

/**
 * @ORMEntity(repositoryClass="...GameRepository")
 * @ORMHasLifecycleCallbacks()
 */
class Game {
    /**
     * @ORMprePersist
     */
    public function setSlugValue() {
        $this->slug = $repo->createUniqueSlugForGame();
    }
}

在prePersist方法中，我需要保证Game的slug字段是唯一的，这就需要进行数据库查询.要进行查询，我需要访问 EntityManager.我可以从 GameRepository 中获取 EntityManager.那么:如何从游戏中获取 GameRespository?

In the prePersist method, I need to ensure that the Game's slug field is unique, which requires a database query. To do the query, I need access to the EntityManager. I can get the EntityManager from inside GameRepository. So: how do I get the GameRespository from a Game?

推荐答案

你没有.Doctrine 2 中的实体应该不知道实体管理器或存储库.

You don't. Entities in Doctrine 2 are supposed to not know of the entity manager or the repository.

针对您提出的案例的典型解决方案是向存储库(或服务类)添加一个方法，该方法用于创建(或调用以存储)新实例，并生成唯一的 slug 值.

A typical solution to the case you present would be to add a method to the repository (or a service class) which is used to create (or called to store) new instances, and also produces a unique slug value.

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