调整设备数据返回

app/Http/Resources/DeviceResource.php

@@ -30,7 +30,7 @@ class DeviceResource extends JsonResource
             }, ''), //录入人
             'created_at' => strtotime($this->created_at) ?? 0, //录入时间
             'is_recommend' => $this->is_recommend,
-            'sort'  => $this->sort,
+            'sort'  => $this->sort ?? 0,
         ];
     }
 }