Strange ActiveRecord::AssociationTypeMismatch

Question

I am getting a very strange error when running a spec:

Failure/Error: entity = Factory.create(:entity, :name => \"Test Entity\", :creator => user)
 ActiveR         


        

Answer 1

Rather than disable class caching, which can be aggravating while in development, the problem might disappear if you get your object fresh before using it. In my case I was loading an object from an association:

desired_object = foo.bar

Finding the item instead removed the problem and didn't require caching classes.

desired_object = Bar.find(foo.bar_id)

I know it isn't ideal, but perhaps this will help someone find out just why it is happening at all.