protected function doClean($value)
{
$clean = parent::doClean($value);
$current_zone = $this->getOption('current_zone');
if (!is_null($current_zone)) {
if ($current_zone->isParentOf($value)) {
throw new sfValidatorError($this, 'invalid', array('value' => $value));
}
}
return $clean;
}
