Question

I used to have a straight up controller returning a view like this

return View(db.Stuff.ToList()); 

This works fine. I started laborating a bit and found that this:

var items = from g in db.Stuff
            select g;
return View(items);

…also works fine. However, as I try to join with another table :

var items = from g in db.Stuff
            join ug in db.OtherStuff on g.Id equals ug.StuffId
            where !ug.UserId.Equals(1)
            select g;
return View(items);

I get an error in the view saying:

Unable to create a constant value of type ‘System.Object’. Only primitive types (‘such as Int32, String, and Guid’) are supported in this context.

Why is this? Another odd thing is that if I comment out the where clause, it seams to work again (work as in not throw an exception)

Answer 1

Try changing your where clause to this:

where ug.UserId != 1