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Posted on 1/28/2019 2:53:21 PM | | |
Unique Key constraints for multiple columns in Entity Framework
I'm using Entity Framework 5.0 Code First;



I want to make

Id FirstColumn SecondColumn
1 1 1 = OK
2 2 1 = OK
3 3 3 = OK
5 3 1 = this OK
4 3 3 = GRRRRR！ There is a mistake here
solution

With Entity Framework 6.1, you can now do this:


The second parameter in the property is where you can specify the position of the columns in the index.

MSDN documentation:https://docs.microsoft.com/zh-cn ... otations#IndexMulti





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