#154 Polymorphic Association - RailsCastsclass Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true end class Article < ActiveRecord::Base has_many :comments, :as => :commentable end class Photo < ActiveRecord::Base has_many :comments, :as => :commentable #... end class Event < ActiveRecord::Base has_many :comments, :as => :commentable end # comments_controller def index @commentable = find_commentable @comments = @
