If I have an entity that has an association (e.g. Book.Publisher), how do I save a new Book and associate it with an existing Publisher?
BTW I don't want to expose FK associations (i.e. PublisherId) in my model.
I had been using something like this:
var book = new Book { Title="whatever", Publisher = new Publisher { Id = 42 } };
context.Books.Add(book);
But this just tries to add a new publisher.
I saw this question which suggested using ObjectStateManager.ChangeObjectState but I get an error if I try this - The ObjectStateManager does not contain an ObjectStateEntry with a reference to an object of type 'Blah.Publisher'.