NHibernate 映射代码 ManyToMany

Question

问题

我通过代码使用 NHibernate 映射来映射关系。在这种情况下，我将用户映射到角色再到权限。用户和角色是 n:m 关系，角色和权限也是如此。 SQL 数据库是 SQL 服务器。如果我从角色和权限之间的代码中删除 n:m 关系车间，我的代码就可以工作。如果它在那里，我得到以下 MappingException:

Could not determine type for: 
Dtp.Entities.AppPrivilege, Dtp.Entities, for columns: NHibernate.Mapping.Column(id)

我找不到差异的根源，因为用户和角色之间的同一个关系可以正常工作。任何人都可以阐明这个问题吗？

产生错误的精确部分（如果注释掉它就会消失）是 AppRole.AppPrivileges.

的 Bag

我的代码

应用用户

~~~Table~~~

AppUserId, uniqueidentifier, not null
//some omitted properties

~~~实体~~~

public class AppUser {
    public virtual Guid AppUserId { get; set; }
    //some omitted properties
    public virtual IList<AppRole> AppRoles { get; set; }
}

~~~映射~~~

public class AppUserMap : ClassMapping<AppUser>
{
    public AppUserMap()
    {
        Table("AppUser");
        Schema("dbo");
        Lazy(true);
        Id(x => x.AppUserId, map => map.Generator(Generators.GuidComb));
        //some omitted properties
        Bag(x => x.AppRoles,
            colmap => {
                colmap.Cascade(Cascade.None);
                colmap.Table("AppUser_AppRole");
                colmap.Key(x => x.Column("AppUserId"));
            },
            map => map.ManyToMany(many => many.Column("AppRoleId")));
    }
}

AppUser_AppRole

~~~Table~~~

AppUserId, uniqueidentifier, not null
AppRoleId, uniqueidentifier, not null

AppRole

~~~Table~~~

AppRoleId, uniqueidentifier, not null
//some omitted properties

~~~实体~~~

public class AppRole{
    public virtual Guid AppRoleId { get; set; }
    //some omitted properties
    public virtual IList<AppUser> AppUsers { get; set; }
    public virtual IList<AppPrivilege> AppPrivileges { get; set; }
}

~~~映射~~~

public class AppRoleMap : ClassMapping<AppRole> {

    public AppRoleMap()
    {
        Table("AppRole");
        Schema("dbo");
        Lazy(true);
        Id(x => x.AppRoleId, map => map.Generator(Generators.GuidComb));
        //some omitted properties
        Bag(x => x.AppUsers, 
            colmap => {
                colmap.Cascade(Cascade.None);
                colmap.Table("AppUser_AppRole");
                colmap.Key(x => x.Column("AppRoleId"));
            }, 
            map => map.ManyToMany(many => many.Column("AppUserId")));
        //The following definition produces the bug.
        Bag(x => x.AppPrivileges,
            colmap => {
                colmap.Cascade(Cascade.None);
                colmap.Table("AppRole_AppPrivilege");
                colmap.Key(x => x.Column("AppRoleId"));
            },
            map => map.ManyToMany(many => many.Column("AppPrivilegeId")));
    }
}

AppRole_AppPrivilege

~~~Table~~~

AppRoleId, uniqueidentifier, not null
AppPrivilegeId, uniqueidentifier, not null

AppPrivilege

~~~Table~~~

AppPrivilegeId, uniqueidentifier, not null
//some omitted properties

~~~实体~~~

public class AppPrivilege {
    public virtual Guid AppPrivilegeId { get; set; }
    //some omitted properties
    public virtual IList<AppRole> AppRoles { get; set; }
}

~~~映射~~~

public class AppPrivilegeMap: ClassMapping<AppPrivilege> {

    public AppPrivilegeMap()
    {
        Table("AppPrivilege");
        Schema("dbo");
        Lazy(true);
        Id(x => x.AppPrivilegeId, map => map.Generator(Generators.GuidComb));
        //some omitted properties
        Bag(x => x.AppRoles,
            colmap => {
                colmap.Cascade(Cascade.None);
                colmap.Table("AppRole_AppPrivilege");
                colmap.Key(x => x.Column("AppPrivilegeId"));
            },
            map => map.ManyToMany(many => many.Column("AppRoleId")));
    }
}

Answer 1

在上述文件中找不到此问题的答案。我只是忘记在 NHibernateHelper.OnConfigure() 期间将 AppPrivilegeMap 添加到 ModelMapper。

现在最后的任务是找出.Inverse(true)的放置位置，这样序列化一个对象就不会因为循环引用而导致异常了。

NHibernate 映射代码 ManyToMany

NHibernate mapping by code ManyToMany

nhibernate

many-to-many

nhibernate-mapping

nhibernate-mapping-by-code

问题

我的代码

应用用户

AppUser_AppRole

AppRole

AppRole_AppPrivilege

AppPrivilege