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POEntity Framework Mapping Question
 

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    <p>Trying to map the following schema using the Entity Framework.</p> <ul> <li>A Customer can have many associated Stores. </li> <li>A Store can have many associated Customer </li> <li>Each Store can have 0 or 1 and only 1 TopCustomer (the criteria to be a TopCustomer is determined in the business logic) </li> </ul> <p><img src="https://imgur.com/ZbEGD.gif" alt="alt text"></p> <p>this results with the following mapping in VS. </p> <p><img src="https://imgur.com/CZyp5.gif" alt="alt text"></p> <hr> <p>Here's the DB Script :</p> <pre> <code> 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 </code> </pre> <hr> <p><strong>Question :</strong></p> <p>How can the TopCustomer association be mapped to a single instance of Customer without creating an extra navigation property on the Customer class ?</p>
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    1. COSorry, which application are you using to do the mappings?
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