# File lib/couchrest/model/designs/view.rb, line 361
        def per(num)
          raise "View#page must be called before #per!" if limit_value.nil? || offset_value.nil?
          if (n = num.to_i) <= 0
            self
          else
            limit(num).skip(offset_value / limit_value * n)
          end
        end