Question

Any idea why I am getting this error:

Exception encountered: #<NoMethodError: undefined method `assert_valid_keys' for :widget:Symbol>

when I try to do a Factory.build(:widget) on the following model:

class Widget < ActiveRecord::Base
  belongs_to :designer, :vendor
  # ...
end

When I remove the belongs_to line the error goes away.

Answer 1

 belongs_to :designer, :vendor

won’t work. :vendor is treated like an option. And, of course, there isn’t such an option. See docs for further information.

If you need two belongs_to relations, just change your code to:

 belongs_to :designer
 belongs_to :vendor