_assign_attributes

# File activerecord/lib/active_record/attribute_assignment.rb, line 6
      def _assign_attributes(attributes)
        multi_parameter_attributes = nested_parameter_attributes = nil

        attributes.each do |k, v|
          key = k.to_s

          if key.include?("(")
            (multi_parameter_attributes ||= {})[key] = v
          elsif v.is_a?(Hash)
            (nested_parameter_attributes ||= {})[key] = v
          else
            _assign_attribute(key, v)
          end
        end

        assign_nested_parameter_attributes(nested_parameter_attributes) if nested_parameter_attributes
        assign_multiparameter_attributes(multi_parameter_attributes) if multi_parameter_attributes
      end