学说:扩展实体类

Doctrine: extending entity class(学说:扩展实体类)

问题描述

我想扩展 EntityBase 类，如何在 Doctrine 2.1 中做到这一点?我的研究表明，每当有人遇到这样做的问题时，他都会切换到 Doctrine 1.2 :)n 我正在使用 yaml 配置

I would like to extend EntityBase classes, how to do this in Doctrine 2.1? My research showed that whenever someone encounters the problem with doing this he switches to Doctrine 1.2 :)n I am using yaml configuration

推荐答案

Doctrine 2.X 实体作为 POPO(Plain Old PHP Objects)工作.为了实现正确扩展，Doctrine 强制您使用 JPA 中称为映射超类的概念.这个想法很简单.每当您想要拥有一个基类并希望您的实体从它扩展(我不是在谈论 DB 级别的继承)时，您所需要做的就是将您的 Base 类创建为 MappedSuperClass.

Doctrine 2.X Entities work as POPOs (Plain Old PHP Objects). To achieve extending correctly, Doctrine enforces you to use a concept from JPA called Mapped Super Classes. The idea is pretty simple. Whenever you want to have a base class and want your entities to extend from it (I'm not talking about inheritance at DB level), all you need to do is create your Base class as a MappedSuperClass.

这里是一个例子:http://www.doctrine-project.org/docs/orm/2.1/en/reference/inheritance-mapping.html#mapped-superclasses

谢谢

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