gistfile1.rb

def search_cache
    @search_cache ||= Sunspot.search [Course, Channel, Episode] do
      keywords(query)
      any_of do
        with(:channel_id, accessible_channel_ids)
        with(:course_id, accessible_course_ids)
        with(:episode_id, accessible_episode_ids)
      end
      paginate(:page => current_page)
    end
  end