Entity framework 实体框架映射问题

正在尝试使用实体框架映射以下架构

• 一个客户可以有许多相关的商店
• 一个商店可以有许多关联的客户
• 每个商店可以有0个或1个TopCustomer，并且只有1个TopCustomer（TopCustomer的标准在业务逻辑中确定）

这将导致VS中的以下映射

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下面是DB脚本：

USE [TestDb]
GO
/****** Object:  Table [dbo].[Customer]    Script Date: 06/20/2009 09:53:52 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Customer](
    [CustomerId] [uniqueidentifier] NOT NULL,
    [FirstName] [nvarchar](50) NOT NULL,
    [LastName] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_Customer] PRIMARY KEY CLUSTERED 
(
    [CustomerId] 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
/****** Object:  Table [dbo].[Store]    Script Date: 06/20/2009 09:53:52 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Store](
    [StoreId] [uniqueidentifier] NOT NULL,
    [StoreName] [nvarchar](50) NOT NULL,
    [TopCustomer] [uniqueidentifier] NULL,
 CONSTRAINT [PK_Store] PRIMARY KEY CLUSTERED 
(
    [StoreId] 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
/****** Object:  Table [dbo].[CustomerStore]    Script Date: 06/20/2009 09:53:52 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[CustomerStore](
    [CustomerId] [uniqueidentifier] NOT NULL,
    [StoreId] [uniqueidentifier] NOT NULL,
 CONSTRAINT [PK_CustomerStore] PRIMARY KEY CLUSTERED 
(
    [CustomerId] ASC,
    [StoreId] 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
/****** Object:  ForeignKey [FK_CustomerStore_Customer]    Script Date: 06/20/2009 09:53:52 ******/
ALTER TABLE [dbo].[CustomerStore]  WITH CHECK ADD  CONSTRAINT [FK_CustomerStore_Customer] FOREIGN KEY([CustomerId])
REFERENCES [dbo].[Customer] ([CustomerId])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[CustomerStore] CHECK CONSTRAINT [FK_CustomerStore_Customer]
GO
/****** Object:  ForeignKey [FK_CustomerStore_Store]    Script Date: 06/20/2009 09:53:52 ******/
ALTER TABLE [dbo].[CustomerStore]  WITH CHECK ADD  CONSTRAINT [FK_CustomerStore_Store] FOREIGN KEY([StoreId])
REFERENCES [dbo].[Store] ([StoreId])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[CustomerStore] CHECK CONSTRAINT [FK_CustomerStore_Store]
GO
/****** Object:  ForeignKey [FK_Store_TopCustomer]    Script Date: 06/20/2009 09:53:52 ******/
ALTER TABLE [dbo].[Store]  WITH CHECK ADD  CONSTRAINT [FK_Store_TopCustomer] FOREIGN KEY([TopCustomer])
REFERENCES [dbo].[Customer] ([CustomerId])
GO
ALTER TABLE [dbo].[Store] CHECK CONSTRAINT [FK_Store_TopCustomer]
GO

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问题：

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如何将TopCustomer关联映射到Customer的单个实例，而不在Customer类上创建额外的导航属性？

听起来您已经有了模型工作和映射了

但是您只需要删除额外的导航属性

如果您想删除导航属性，它非常简单（尽管您不能使用标准的EF设计器）

您只需在XML编辑器中打开EDMX文件（在VS中非常简单），然后从客户实体中删除不需要的

这样，关系仍然存在于模型中，但在类中只能从 Store.TopCustomer

你不能走另一条路

希望这有帮助

亚历克斯

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Microsoft Program Manager实体框架团队。

对不起，您使用哪个应用程序进行映射？