public function skusAutocomplete($q)
 {
     $product_skus_model = new shopProductSkusModel();
     $q = $product_skus_model->escape($q, 'like');
     return $product_skus_model->select('id, name AS value')->where("name LIKE '{$q}%' OR sku LIKE '{$q}%'")->limit($this->limit)->fetchAll();
 }