nhibernate queryover 不急切加载多对多连接别名 [英] nhibernate queryover not loading eagerly with a many to many joinalias

问题描述

我正在尝试从我的 User 对象中加载多对多集合中的角色.

I'm trying to eager load roles in many to many collection off of my User object.

Role role = null;
IQueryOver<User, User> query = session.QueryOver<User>()
                                .Fetch( p => p.Roles).Eager
                                .JoinAlias( q => q.Roles, () => role)
                                .Where(() => role.Active == true);

给我留下了具有未初始化角色成员的用户对象.如果我删除 joinalias，它们会被初始化得很好.这只是 NH​​3 错误还是我做错了什么?

leaves me with user objects that have uninitialized roles members. If I remove the joinalias, they are initialized just fine. Is this just an NH3 bug or am I doing something wrong?

推荐答案

另一种实现预加载的方法是设置 LeftOuterJoin.它在类似场景

Another way to make eager load is to set LeftOuterJoin. It helped to us in a similar scenario

Role role = null;
IQueryOver<User, User> query = session.QueryOver<User>().Fetch( p => p.Roles).Eager
                                                        .JoinAlias( q => q.Roles, () => role, JoinType.LeftOuterJoin)
                                                        .Where(() => role.Active == true);

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