多對多插入

Question

我有一個運行oData的WCF數據服務，並嘗試向其中插入數據。我嘗試從Windows 8客戶端異步。

我的實體是這樣的：

Customer 1 -> m CustomerAddress 1 <- m Address 

我可以插入通過簡單地調用AddObject方法一個地址或客戶並保存更改：

context.AddObject("Customer",new Customer { FirstName="foo" }); 
context.AddObject("Address",new Address { Street="bar" }); 
await context.SaveChangesBatch(); //a extension class that handels the BeginSaveChanges async calls as batch 

我還可以添加之間的關係地址和客戶

Customer customer=new Customer { FirstName="foo" }; 
Address orderAddress=new Address { Street="bar" }; 
CustomerAddress customerAddress = new CustomerAddress { Customer = customer, Address = orderAddress }; 
context.AddObject("Customer",customer); 
context.AddObject("Address",orderAddress); 
context.AddObject("CustomerAddress",customerAddress); 
await context.SaveChangesBatch(); 

但是，我不能添加第二個相關的地址上下文：

Address orderAddress=new Address { Street="bar" }; 
Address deliveryAddress=new Address { Street="bar2" }; 
CustomerAddress customerAddress = new CustomerAddress { Customer = customer, Address = orderAddress }; 
Customer customer=new Customer { FirstName="foo" }; 
CustomerAddress customerAddress = new CustomerAddress { Customer = customer, Address = deliveryAddress }; 
context.AddObject("Customer",customer); 
context.AddObject("Address",orderAddress); 
context.AddObject("Address",deliveryAddress); 
context.AddObject("CustomerAddress",customerAddress); 
context.AddObject("CustomerAddress",customerAddress2); 
await context.SaveChangesBatch(); 

在this post我瞭解，這是enougth只是插入相關實體是這樣的：

CustomerAddress customerAddress = new CustomerAddress { Customer = customer, Address = orderAddress }; 
CustomerAddress2 customerAddress = new CustomerAddress { Customer = customer, Address = deliveryAddress }; 
context.AddObject("CustomerAddress",customerAddress); 
context.AddObject("CustomerAddress",customerAddress2); 
await context.SaveChangesBatch(); //On save, it should automatically insert customer and order but it dosn't work :(

這將是完美的，但它dosn沒有工作。該錯誤顯示一個外鍵錯誤。我有沒有設置錯誤？我的EF看起來是這樣的：

我必須對foregin關鍵屬性添加的內容：（我使用的模型首先計算策略）

作爲一個額外的節點：我使用SQL Azure的數據庫，所以組合鍵不準:(

Answer 1

可能是我錯了，但不同的是，在後您引用的MemberComments（你的情況 - CustomerAddress） - 是集：

public virtual ICollection<MemberComment> MemberComments { get; set; } 

並添加項目時，將他們不要的上下文，而是要收藏：

上下文。 會員評論 .Add（memberComment1）; //還將添加member1 和comment1上下文。 會員評論 .Add（memberComment2）; //也 將增加註釋2像

方面

所以，你的情況，很可能，它應該是什麼。 your_defined_CustomerAddressesList .add（customerAddress）; 上下文。 your_defined_CustomerAddressesList .add（customerAddress2）;