content_subscriber.rb

class Profile::ContentSubscriber
  include ResqueBus::Subscriber

  subscribe :post_rated

  def post_rated(attributes)
    total = Profile::Rate.where(author_id: attributes['author_id']).count
    sum   = Profile::Rate.where(author_id: attributes['author_id']).sum(:rating)

    profile = Profile::Document.find_by(user_id: attributes['post_author_id'])
    profile.post_ratings_total  = total
    profile.post_rating_average = sum.to_f / (5*total.to_f)
    profile.save!
  end
end