强制惰性实体加载真实实例 [英] Force lazy entity to load real instance

问题描述

我有一个惰性实体的代理，该惰性实体是通过加载子实体在会话中创建的.对父实体的后续提取仅返回NH代理.我需要实际实例来检查类型(实体已加入子类).我一定想念一些东西，但是我找不到办法. Session.Refresh(proxy)似乎没有帮助，我尝试过的HQL也没有帮助.

I have a proxy for a lazy entity which has been created in the session by loading a child entity. A subsequent fetch on the parent entity only returns the NH proxy. I need the actual instance to check the type (the entity has joined subclasses). I must be missing something, but I can't find a way to do this. Session.Refresh(proxy) does not appear to help, nor does any flavour of HQL that I've tried.

任何人都可以帮忙吗?

推荐答案

要强制从数据库中获取代理，可以使用NHibernateUtil.Initialize(proxy)方法，或访问代理的方法/属性.

To force a proxy to be fetched from the database, you can use the NHibernateUtil.Initialize(proxy) method, or access a method/property of the proxy.

var foo = session.Get<Foo>(id);
NHibernateUtil.Initialize(foo.Bar);

要检查对象是否已初始化，可以使用NHibernateUtil.IsInitialized(proxy)方法.

To check if an object is initialized or not, you can use the NHibernateUtil.IsInitialized(proxy) method.

更新:

要从会话缓存中删除对象，请使用Session.Evict(obj)方法.

To remove an object from the session cache, use the Session.Evict(obj) method.

session.Evict(myEntity);

有关Evict的信息和其他用于管理会话缓存的方法，可以在第14.5章.

Info about Evict and other methods for managing the session cache can be found in chapter 14.5 of the NHibernate docs.

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