diff --git a/app/api/controller/Merchant.php b/app/api/controller/Merchant.php
index 72030e05..d4acc29c 100644
--- a/app/api/controller/Merchant.php
+++ b/app/api/controller/Merchant.php
@@ -129,8 +129,8 @@ class Merchant extends Controller
      */
     public function list(): Json {
         $model = new MerchantModel;
-        $pageSize = $this->request->param('pageSize') ?? 15;
-        $sort = $this->request->param('sort') && !empty($this->request->param('sort')) ?? "merchant_id";
+        $pageSize = $this->request->param('pageSize', 15);
+        $sort = $this->request->param('sort', "merchant_id");
         $list = $model->getList($this->request->param(), intval($pageSize), $sort)->toArray();
 
         foreach ($list['data'] as $kr => $r) {