# File lib/aws/record/validators/format.rb, line 32
      def validate_attribute record, attribute_name, value_or_values
        each_value(value_or_values) do |value|

          if options[:with]
            unless value.to_s =~ options[:with]
              record.errors.add(attribute_name, message)
            end
          end

          if options[:without]
            unless value.to_s !~ options[:without]
              record.errors.add(attribute_name, message)
            end
          end

        end
      end