# File lib/active_record/validations.rb, line 901
      def validates_associated(*attr_names)
        configuration = { :on => :save }
        configuration.update(attr_names.extract_options!)

        validates_each(attr_names, configuration) do |record, attr_name, value|
          unless (value.is_a?(Array) ? value : [value]).inject(true) { |v, r| (r.nil? || r.valid?) && v }
            record.errors.add(attr_name, :invalid, :default => configuration[:message], :value => value)
          end
        end
      end