重新附加实体 [英] Re-Attach an Entity

问题描述

我遇到重新附加实体的问题。

E.G： 我有2个Orders实体实例，  order1和order2 and products是订单实体的导航属性作为实体集合。

public List< Orders> GetOrders（订单order1，Order order2，int id）

{

List< Orders> orderList = new List< Orders>（）;

Product product1 = dbContext.ProductsSet.Where（s => s.Category = id）.First（）;

order1.Products.Attach（product1）; //将product1附加到order1

orderList .Add（order1）;

order2.Products.Attach（product1）; //将product1附加到order2

orderList .Add（order2）; 

return orderList;

}

问题： 在OrderList集合中，product1仅附加到  order2实体，而不是附加到order1实体。有没有办法将product1附加到order1和order2实体？

谢谢，

AN

 

解决方案

您好AN，

Order和Product实体是否包含one-to - 很多关系？ 如果是这样，某些产品只能有一个订单实体。 您能否告诉我们您为什么要将单个产品附加到两个不同的订单实体？  

谢谢你们b $ b Lingzhi Sun

Iam having an issue with re-attaching entity.

E.G:  I have 2 instances of Orders entity,  order1 and order2 and products is the navigation propery of order entity as Entity Collection.

public List<Orders> GetOrders(Order order1, Order order2,int id)

{

List<Orders> orderList = new List<Orders>();

Product product1 = dbContext.ProductsSet.Where(s=> s.Category= id).First();

order1.Products.Attach(product1); // Attaches product1 to order1

orderList .Add(order1);

order2.Products.Attach(product1); //Attaches product1 to order2

orderList .Add(order2); 

return orderList;

}

Issue:  In the OrderList collection product1 is attached only to order2 entity and not to order1 entity. Is there a way to attach product1 to both order1 and order2 entity?

Thanks,

AN

 

解决方案

Hi AN,

Do the Order and Product entities contain one-to-many relationship?  If so, certain Product could only have one Order entity.  Could you please tell us why do you want to attach a single Product to two different Order entity?  

Thanks
Lingzhi Sun

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