dependent => destroy on a “has_many through” association

Question

Apparently dependent => destroy is ignored when also using the :through option.

So I have this...

class Comment < ActiveRecord::Base
  has_many :c         


        

Answer 1

If you have a polymorphic association, you should do what @blogofsongs said but with a foreign_key attribute like so:

class User < ActiveRecord::Base
  has_many :activities , dependent: :destroy, foreign_key: :trackable_id
end