Fluent NHibernate，多个抽象基类继承不加载中间基类

一般示例：

抽象映射类A。抽象映射类B:A.B有一个int类型的属性（或者你想要的任何类型）映射类C:A.

抽象映射类D具有类型a的性质。映射类E:D.具有类型B的属性。

将E保存到数据库中。检索它并尝试从E访问B.int。throws"InvalidCastException：无法将"AProxy"类型的对象强制转换为"B"类型。

使用Fluenthibernate：1.3.0Nhibernate：3.2.0.4

实际剥离示例：

基本模板表：

USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [temp].[BaseTemplate](
    [ID] [int] IDENTITY(1,1) NOT NULL,
 CONSTRAINT [PK_BaseTemplate] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

MiddleTemplate表：

USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [temp].[MiddleTemplate](
    [ID] [int] NOT NULL,
    [MiddleTemplateProperty] [int] NULL,
 CONSTRAINT [PK_MiddleTemplate] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [temp].[MiddleTemplate]  WITH CHECK ADD  CONSTRAINT [FK_MiddleTemplate_BaseTemplate] FOREIGN KEY([ID])
REFERENCES [temp].[BaseTemplate] ([ID])
GO
ALTER TABLE [temp].[MiddleTemplate] CHECK CONSTRAINT [FK_MiddleTemplate_BaseTemplate]
GO

最后一个模板表：

USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [temp].[LastTemplate](
    [ID] [int] NOT NULL,
    [LastTemplateProperty] [int] NULL,
 CONSTRAINT [PK_LastTemplate] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [temp].[LastTemplate]  WITH CHECK ADD  CONSTRAINT [FK_LastTemplate_BaseTemplate] FOREIGN KEY([ID])
REFERENCES [temp].[BaseTemplate] ([ID])
GO
ALTER TABLE [temp].[LastTemplate] CHECK CONSTRAINT [FK_LastTemplate_BaseTemplate]
GO

BaseTemplateInstance表：

USE [DB]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [temp].[BaseTemplateInstance](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [TemplateID] [int] NOT NULL,
 CONSTRAINT [PK_BaseTemplateInstance] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [temp].[BaseTemplateInstance]  WITH CHECK ADD  CONSTRAINT [FK_BaseTemplateInstance_BaseTemplate] FOREIGN KEY([TemplateID])
REFERENCES [temp].[BaseTemplate] ([ID])
GO
ALTER TABLE [temp].[BaseTemplateInstance] CHECK CONSTRAINT [FK_BaseTemplateInstance_BaseTemplate]
GO

LastTemplateInstance表：

USE [DB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [temp].[LastTemplateInstance](
    [ID] [int] NOT NULL,
 CONSTRAINT [PK_LastTemplateInstance] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [temp].[LastTemplateInstance]  WITH CHECK ADD  CONSTRAINT [FK_LastTemplateInstance_BaseTemplateInstance] FOREIGN KEY([ID])
REFERENCES [temp].[BaseTemplateInstance] ([ID])
GO
ALTER TABLE [temp].[LastTemplateInstance] CHECK CONSTRAINT [FK_LastTemplateInstance_BaseTemplateInstance]
GO

类别：

public abstract class BaseTemplate
public abstract class MiddleTemplate : BaseTemplate
    {
        public virtual int MiddleTemplateProperty { get; set; }
    }
public class LastTemplate : MiddleTemplate
    {
        public virtual int LastTemplateProperty { get; set; }
    }
public abstract class BaseTemplateInstance
    {
        public virtual BaseTemplate Template { get; set; }
        protected BaseTemplateInstance() {}
        protected BaseTemplateInstance(BaseTemplate template) : this()
        {
            Template = template;
        }
    }
public class LastTemplateInstance : BaseTemplateInstance
    {
        protected LastTemplateInstance() {}
        public LastTemplateInstance(LastTemplate template)
            :base(template) {}
        public virtual int MiddleTemplateProperty { get { return ((MiddleTemplate) Template).MiddleTemplateProperty; } }
    }

映射：

public class BaseTemplateMap : ClassMap<BaseTemplate>
    {
        public BaseTemplateMap()
        {
            Table("temp.BaseTemplate");
            // Unique Identifier
            Id(x => x.Id, "ID")
                .GeneratedBy.Identity();
        }
    }
 public class MiddleTemplateMap : SubclassMap<MiddleTemplate>
    {
        public MiddleTemplateMap()
        {
            Table("temp.MiddleTemplate");
            KeyColumn("ID");
            Map(x => x.MiddleTemplateProperty)
                .Nullable();
        }
    }

public class LastTemplateMap : SubclassMap<LastTemplate>
    {
        public LastTemplateMap()
        {
            Table("temp.LastTemplate");
            KeyColumn("ID");
            Map(x => x.LastTemplateProperty)
                .Nullable();
        }
    }
public class BaseTemplateInstanceMap : ClassMap<BaseTemplateInstance>
    {
        public BaseTemplateInstanceMap()
        {
            Table("temp.BaseTemplateInstance");
            // Unique Identifier
            Id(x => x.Id, "Id")
                .GeneratedBy.Identity();
            References(x => x.Template, "TemplateID")
                .Not.Nullable();
        }
    }
public class LastTemplateInstanceMap : SubclassMap<LastTemplateInstance>
    {
        public LastTemplateInstanceMap()
        {
            Table("temp.LastTemplateInstance");
            // Unique Identifier
            KeyColumn("ID");
        }
    }

测试示例：

[TestFixture]
    internal class TempFileTests
    {
        #region Members
        private LastTemplate _entity;
        private MappingsRepository _repository;
            #endregion // Members
        #region SetUp
        [TestFixtureSetUp]
        public void SetUpFixture()
        {
            _repository = MappingsRepository.GetInstance();
        }
        [SetUp]
        public void SetUp()
        {
            _entity = new LastTemplate();
        }
        #endregion // SetUp
        #region Tests
        [Test]
        public void LastTemplateInstanceMappingsTest()
        {
            var lastTemplateInstance = new LastTemplateInstance(_entity);
            _repository.Save(_entity);
            lastTemplateInstance = new PersistenceSpecification<LastTemplateInstance>(_repository.CurrentSession)
                .VerifyTheMappings(lastTemplateInstance);
            var middleProperty = lastTemplateInstance.MiddleTemplateProperty;
        }
        #endregion // Tests
        #region TearDown
        [TearDown]
        public void TearDown()
        {
            if (_entity != null && !_entity.IsNew())
                _repository.Delete(_entity);
        }
        [TestFixtureTearDown]
        public void TearDownFixture()
        {
            _repository.Dispose();
            _repository = null;
        }
        #endregion // TearDown
    }