Nette\Forms\Controls\BaseControl::addRule PHP Метод

    public function addRule($validator, $message = NULL, $arg = NULL)
    {
        $this->rules->addRule($validator, $message, $arg);
        return $this;
    }

 /**
  * Add default conditions.
  * Supports: required, min/maxLength, min, max
  *
  * @param \Nette\Forms\Controls\BaseControl $input
  * @param array $conditions
  */
 protected function addConditions(\Nette\Forms\Controls\BaseControl $input, array $conditions)
 {
     foreach ($conditions as $key => $value) {
         switch ($key) {
             case 'required':
                 $input->setRequired();
                 break;
             case 'maxLength':
                 $input->addRule(Builder\EntityForm::MAX_LENGTH, null, $value);
                 break;
             case 'minLength':
                 $input->addRule(Builder\EntityForm::MIN_LENGTH, null, $value);
                 break;
             default:
                 break;
         }
     }
     if (isset($conditions['min']) || isset($conditions['max'])) {
         $input->addRule(Builder\EntityForm::RANGE, null, array(isset($conditions['min']) ? $conditions['min'] : null, isset($conditions['max']) ? $conditions['max'] : null));
     }
 }