trace

app/api/controller/Merchant.php

@@ -130,7 +130,7 @@ class Merchant extends Controller
     public function list(): Json {
         $model = new MerchantModel;
         $pageSize = $this->request->param('pageSize') ?? 15;
-        $sort = $this->request->param('sort') ?? "merchant_id";
+        $sort = $this->request->param('sort') && !empty($this->request->param('sort')) ?? "merchant_id";
         $list = $model->getList($this->request->param(), intval($pageSize), $sort)->toArray();
 
         foreach ($list['data'] as $kr => $r) {