validate_order_args

# File activerecord/lib/active_record/relation/query_methods.rb, line 2016
      def validate_order_args(args)
        args.each do |arg|
          next unless arg.is_a?(Hash)
          arg.each do |_key, value|
            if value.is_a?(Hash)
              validate_order_args([value])
            elsif VALID_DIRECTIONS.exclude?(value)
              raise ArgumentError,
                "Direction \"#{value}\" is invalid. Valid directions are: #{VALID_DIRECTIONS.to_a.inspect}"
            end
          end
        end
      end