NHibernate Fluent NHibernate异常

Problem ：

有些搜索可以存储在DB中 . 每个搜索都有一组过滤器 . 还有角色 . 每个角色可以（可空列）分配一个默认搜索 . 此外，每个搜索对零或多个角色（多对多关系）可见 .

当我尝试访问搜索过滤器时，NH尝试访问过滤器表中不存在的filters.DefaultSearchId .

DB:

CREATE TABLE [dbo].[Searches]
(
    Id int identity(1,1) primary key,
    Description nvarchar(2000) not null
);

CREATE TABLE [dbo].[Filters]
(
    Id int identity(1,1) primary key,
    Description nvarchar(2000) not null,
    SearchId int not null references Searches(Id)
);

CREATE TABLE [dbo].[Roles]
(
    Id int identity(1,1) primary key,
    Name nvarchar(255) not null,
    DefaultSearchId int null references Searches(Id)
);
CREATE TABLE [dbo].[SearchesRoles]
(
    SearchId int not null references Searches(Id),
    RoleId int not null references Roles(Id)
);

Entities:

public class Search {
        public virtual int Id { get; set; }
        public virtual string Description { get; set; }
        public virtual ICollection<Filter> Filters { get; set; }
        public virtual ICollection<Role> Roles { get; set; }
    }

    public class Filter {
        public virtual int Id { get; set; }
        public virtual string Description { get; set; }
        public virtual Search Search { get; set; }
    }

    public class Role {
        public virtual int Id { get; set; }
        public virtual string Name { get; set; }
        public virtual Search DefaultSearch { get; set; }
    }

Mappings:

public class SearchMap : ClassMap<Search>{
        public SearchMap() {
            Table("Searches");
            Id(x => x.Id).GeneratedBy.Identity();
            Map(x => x.Description);
            HasMany(x => x.Filters).Inverse().Cascade.All().AsBag();
            HasManyToMany(x => x.Roles).Table("SearchesRoles").ParentKeyColumn("SearchId").ChildKeyColumn("RoleId");
        }
    }

 public class FilterMap : ClassMap<Filter> {
        public FilterMap() {
            Table("Filters");
            Id(x => x.Id).GeneratedBy.Identity();
            Map(x => x.Description);
            References(x => x.Search).Column("SearchId");
        }
    }
 public class RoleMap : ClassMap<Role> {
        public RoleMap() {
            Table("Roles");
            Id(x => x.Id).GeneratedBy.Identity();
            Map(x => x.Name);
            References(x => x.DefaultSearch).Column("DefaultSearchId");
        }
    }

Code:

class Program {
        static void Main() {
            var sessionFactory = CreateSessionFactory();
            using (var session = sessionFactory.OpenSession()) {
                var search = session.Get<Search>(1);
                foreach (var filter in search.Filters) {
                    Console.WriteLine(filter);
                }
            }
        }

        static ISessionFactory CreateSessionFactory(){
            string connectionString = @"server=.\sql2008; user id = sa; pwd=1; database = nhbug;";
            return Fluently.Configure()
                .Database(MsSqlConfiguration.MsSql2008.ConnectionString(connectionString))
                .Mappings(m=>m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())).BuildSessionFactory();
        }
    }

ERROR:

访问search.Filters属性时，NHibernate尝试访问不应该存在的Filters.DefaultSearchId db列 . 此列存在于Roles表中，但不存在于过滤器中 .

QUESTION:

是配置无效，Fluent NHibernate还是NHibernate错误？

我正在使用SQL Server 2008 R2，NHibernate 2.1.2和Fluent NHibernate 1.1.0.685，尽管这个问题也存在于NHibernate 3 beta 2中 .

谢谢 .

更新：这是生成的actual SQL

UPDATE2：CDMDOTNET，同样的错误，同样的sql，不幸的是 .

更新3：Actual exception

更新4：这是一般错误的特定用例：实体引用其他实体为'many-to-many'，另一方面引用'many-to-many' assoc . 另一个实体引用源实体（在我的例子中是DefaultQuery） . 当访问源实体的 any 子集合（一对多）时，NH会疯狂（在我的情况下是过滤器） .

更新5：Sample data

更新6：XML issued by Fluent NHibernate