execute_callstack_for_multiparameter_attributes

# File activerecord/lib/active_record/base.rb, line 2015
      def execute_callstack_for_multiparameter_attributes(callstack)
        errors = []
        callstack.each do |name, values_with_empty_parameters|
          begin
            send(name + "=", read_value_from_parameter(name, values_with_empty_parameters))
          rescue => ex
            errors << AttributeAssignmentError.new("error on assignment #{values_with_empty_parameters.values.inspect} to #{name}", ex, name)
          end
        end
        unless errors.empty?
          raise MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes"
        end
      end