def List.cached_recently_updated(category, conditions, sort_column, sort_direction, limit, offset)
    get_cache('recently_updated:' + category.to_s + conditions.to_s + sort_column.to_s + sort_direction.to_s + limit.to_s + offset.to_s) do
      recently_updated(category, conditions, sort_column, sort_direction, limit, offset)
    end
  end