blah

blah

class Comment < ActiveRecord::Base
 belongs_to :commentable, :polymorphic => true
 belongs_to :user

 attr_accessible :body, :user

 validates_length_of :body, :minimum => 1
 validates_presence_of :user
end

#So we have this comment class, that we can also think of as favorite
We can write a neat mixin that makes it so we can make anything commentable

module Commentable
 extend ActiveSupport::Concern

 included do
   attr_accessible :comments
   has_many :comments, :as => :commentable, :autosave => true
   accepts_nested_attributes_for :comments

   def add_comment(author, body)
     self.comments << Comment.create!(:admin => author, :body => body)
     save
   end
 end
end