实体框架中的循环依赖 [英] circular dependency in entity framework

问题描述

是否可以保存具有循环依赖性的模型？

Is it possible to save model which has got circular dependency ?

我对我的数据库进行非规范化：

I denormalized my Database:

User
--------
UserId
UserName
LastOrder   - fk to last order


Order
-------
OrderId
OrderName
UserId
OrderDate

是否可以使用entityFramework保存sth？

Is it possible to save sth like this using entityFramework?

它的工作原因现在我有错误：

what should I change to make it work cause now I have got error:

无法确定依赖操作的有效排序。
由于外键约束，模型
要求或存储生成值，可能存在依赖关系。

Unable to determine a valid ordering for dependent operations. Dependencies may exist due to foreign key constraints, model requirements, or store-generated values.

推荐答案

我有一张与自己有关系的表，我得到了同样的错误。结果外键必须为空。
实体框架中的表格关系相同
我希望这样可以节省人们比浪费时间更多的时间。

I had a table that had a relationship to itself and i was getting the same error. Turns out the foreign key has to be nullable. Same table relationship in Entity Framework I hope this saves someone more time than I wasted.

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