rateable.rb

module Rateable
  def self.included(base)
    base.class_eval do
      attribute :average_rating
      attribute :ratings_total
      has_many :all_ratings, foreign_key: "#{self.class.name}_id", class_name: 'Rating' # class_name should be the included class name but returns 'Class'instead
      has_many :published_ratings, -> { where(:status => Rating::STATUSES[:PUBLISHED])},  foreign_key: "#{self.class.name}_id", class_name: "Rating"
    end
  end
end