public function update(Bug $bug)
    {
        $query = $this->_db->prepare(' UPDATE t_bug SET 
		bug=:bug, lien=:lien, updated=:updated, updatedBy=:updatedBy
		WHERE id=:id') or die(print_r($this->_db->errorInfo()));
        $query->bindValue(':id', $bug->id());
        $query->bindValue(':bug', $bug->bug());
        $query->bindValue(':lien', $bug->lien());
        $query->bindValue(':updated', $bug->updated());
        $query->bindValue(':updatedBy', $bug->updatedBy());
        $query->execute();
        $query->closeCursor();
    }