Doctrine 2 使用代理类进行延迟加载，因此您实际上不需要在使用对象之前获取关联的数据.由于 Proxy 类继承自您的关联类，因此您可以像使用 freetch 关联类一样使用代理.

Doctrine 2 uses Proxy classes for lazy loading, so you don't actually need to have the associations' data fetched until you use the objects. Since the Proxy classes inherit from your association classes, you're able to use the proxies exactly as you would use the fretch association classes.

但是，如果你真的需要获取实际的关联类，你需要告诉查询将获取模式设置为 DoctrineORMMappingClassMetadata::FETCH_EAGER.如果您正在使用注释，则可以通过以下方式实现:

but, if you really need to fetch the actual association classes, you need to tell the query to set the fetch mode to DoctrineORMMappingClassMetadata::FETCH_EAGER. If you're using the annotations, you can achieve this with:

例如

/**
 * @ManyToMany(targetEntity="Item", fetch="EAGER")
 */
private $items;