brentmc79

class Tag < ActiveRecord::Base
  has_many :taggings, :dependent => :destroy
  has_many :books, :through => :tagings, :source => :taggable, :source_type => "Book"
  has_many :movies, :through => :tagings, :source => :taggable, :source_type => "Movie"
end

brentmc79

class Book < ActiveRecord::Base
  has_many :taggings, :as => :taggable
  has_many :tags, :through => :taggings
end