BaseFormPropel.class.php

<?php
/**
* Define error
*
* @author Dmitry Nesteruk, Andrey Kotlyarov
* @param string $fieldName
* @param string $message
* @return void
*/
public function defineError($fieldName, $message)
{
  $checkName = 'check_define_'.md5($fieldName);
  $this->getErrorSchema()->getValidator()->addOption($checkName);
  $this->getErrorSchema()->getValidator()->addMessage($checkName, $message);
  $this->getErrorSchema()->addError(
    new sfValidatorError(
      $this->getErrorSchema()->getValidator(),
      $checkName,
      array(
        'value' => sfContext::getInstance()->getRequest()->getParameter($fieldName),
        $checkName => $this->getErrorSchema()->getValidator($checkName)
      )
    )
  );
}