多个到多个插入

Question

我有一个运行oData的WCF数据服务，并尝试将数据插入其中。我正在尝试从Windows 8客户端异步。

我的实体看起来像这样：

Customer 1 -> m CustomerAddress 1 <- m Address

我可以通过简单地调用AddObject方法并保存更改来插入地址或客户：

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

我还可以在地址和客户之间添加关系

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，我无法在上下文中添加第二个相关地址：

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中，我读到了只需插入相关实体就可以了：

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 :(

这将是完美的，但它不起作用。该错误显示forign键错误。我有什么设置错误吗？我的EF看起来像这样：

我是否必须在foregin键属性上添加一些东西:(我正在使用模型第一个approch）

作为附加节点：我使用的是Azure SQL数据库，因此不允许使用复合键：（

Answer 1

可能是我错了，但区别在于你引用的帖子中，MemberComments（在你的情况下是CustomerAddress） - 是集合：

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

添加项目时，不将它们添加到上下文中，而是添加到集合中：

  

上下文的 MemberComments 。新增（memberComment1）。 //还会添加member1   和comment1上下文。成员评论 .Add（memberComment2）; // 也会   添加评论2

所以，在你的情况下，可能，它应该像

  

上下文的 your_defined_CustomerAddressesList 。新增（customerAddress）。   。上下文的 your_defined_CustomerAddressesList 。新增（customerAddress2）;