强制EF以N-M关系创建中间表 [英] Force EF to create middle table in N-M relationship
问题描述
我必须拥有NM关系的实体,这种关系变成两个表E / R模型之间的中间表。
I have to entities with a N-M relationship, that relationship becomes in a middle table between two table E/R model.
在此表具有更多属性之前,但现在它只有来自其他表的id´ s因此EF并不急于显示该表。我的问题是我有很多代码引用该表,我需要知道如何强制EF创建中间表,尽管它和急性; s
不必要 。
Before this table had more atributes but now it only has id´s from other tables so EF doesn´t show that table. My problem is i have a lot code referecing that table and i need to know how to force to EF creates the middle table despite of it´s unnecessary .
其他解决方案是在表格中添加一个新的属性,但在这种情况下,它不会被允许使用。
Other solution would be add a new atribute to table but in this case it´s not allowed.
谢谢。
推荐答案
Hello Jorge,
Hello Jorge,
欢迎来到MSDN论坛,感谢您在此发帖。
Welcome to the MSDN Forum and thanks for posting here.
根据您的描述,我认为这很难,并且 不必要这样做。首先,如果从数据库生成代码,要创建中间表对象,数据库中必须有一个中间表。其次,如果我们首先使用模型
或代码,我们还创建中间表模型或者编写一些代码来创建中间表,然后,可以创建中间表。
According to your description, I think it's really hard and unnecessary to do that. First, if you generate code from database, to create the mid-table object, there must be a mid-table in the database. Second, if we use the model first or code first, we also create mid-table model or write some codes to create mid-table, then, the mid-table could be created.
像这篇文章所说:
http://blogs.msdn.com/b/alexj/archive/2008/02/26/associations -with-payloads-closing-the-loop.aspx
我希望这可以帮到你。
祝你有愉快的一天,
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