while (count($this->find ('all',$params))) {
	if (!preg_match ('/-{1}[0-9]+$/', $slug )) {
		$slug .= '-' . ++$i;
	} else {
		$slug = preg_replace ('/[0-9]+$/', ++$i, $slug );
	}
	$params ['conditions'][$this->name . '.slug']= $slug;
}