添加視圖到EntityFramework 6不起作用？

Question

我有以下看法：

SET ANSI_NULLS ON 
GO 

SET QUOTED_IDENTIFIER ON 
GO 



ALTER VIEW [dbo].[RateAverageValueView] WITH SCHEMABINDING 
AS 
    SELECT 
     Id = NEWID(), 
     AverageRateValue = AVG(Value) 
    FROM dbo.Rate 


GO 

但我不能把它添加到EF模型（EDMX文件）。
我知道它應該有一個主鍵列，所以我加了Id = NEWID()，但它不起作用。
什麼問題？

在Visual Studio中的警告一節中列出以下錯誤：
警告：

Error 6013: The table/view 'YoutubeLinks.dbo.RateAverageValueView' does not have a primary key defined and no valid primary key could be inferred. This table/view has been excluded. To use the entity, you will need to review your schema, add the correct keys, and uncomment it. 

Answer 1

我改變了以下列：

SET ANSI_NULLS ON 
GO 

SET QUOTED_IDENTIFIER ON 
GO 



ALTER VIEW [dbo].[RateAverageValueView] WITH SCHEMABINDING 
AS 
    SELECT 
     Id = 1, 
     AverageRateValue = AVG(Value) 
    FROM dbo.Rate 


GO 

問題解決了:)

Answer 2

使用SCHEMABINDING當您創建視圖，這將允許添加一個PK，在這之前的描述答案：How do you add a primary key to a sql view? - Or alternate way to link views to LINQ-2-Entities