# test that attr_readonly isn't called on the :taggable polymorphic association module Taggable end class Tagging < ActiveRecord::Base belongs_to :tag, :include => :tagging belongs_to :super_tag, :class_name => 'Tag', :foreign_key => 'super_tag_id' belongs_to :invalid_tag, :class_name => 'Tag', :foreign_key => 'tag_id' belongs_to :taggable, :polymorphic => true, :counter_cache => true end