$this->db = \Registry::get('DB');
$mapper = new \DB\SQL\Mapper($this->db,'table');
$text = 'some text';
$mapper->find(["MATCH (name,code) AGAINST (:search IN BOOLEAN MODE)", ':search' => $text ]);
$mapper->relevance = "MATCH (name,code) AGAINST (:search1 IN BOOLEAN MODE)";
$mapper->find(["MATCH (name,code) AGAINST (:search2 IN BOOLEAN MODE)", ':search1' => $text, ':search2' => $text
], ['order'=>'relevance desc']);