Comparing two different types with Entity Framework

Question

Assume I have a Posts table with field Owner of type Person (which has field Name ).

I'm trying to make this shorthand expression work:

from p in Posts where p.Author == "SomeNameAsString" select p;

Which means I would have to compare object of type Person with a string .

I tried to override Equals and to override operators == and !=, but I'm still getting exception "DbComparisonExpression requires arguments with comparable types.".

Is there a way to make two different types comparable in Entity Framework?

Answer 1

EF tries to translate your query into SQL, and while doing that it doesn't seem to take into account your type conversion operators. Simply use this query instead:

from p in Posts where p.Author.Name == "SomeNameAsString" select p;

Answer 2

Have you tried

 from p in Posts where p.Author.Name == "SomeNameAsString" select p; 

(if Name is a property on Author )