EF Inserting Duplicate Parent Objects

Question

I have two classes:

public class Foo
{
    public int FooId {get;set;}
    public virtual ICollection Bars {get;set;}
}

public class Bar
{
    pu         


        

Answer 1

Loading the foo with the same context as adding the new bar with the related foo won't cause a duplication. My guess is that your real code uses two different contexts.

The only thing to change in the code (which won't compile because foo is an IQueryable and not a Foo) is to materialize the foo, for example:

var foo = (from f in context.Foos
          where f.FooId == 1
          select f).Single();

Other than that the code snippet is fine.