refactor:后台商品分类排序增加默认值

backend/modules/goods/models/ars/Category.php

@@ -112,4 +112,12 @@ class Category extends \yii\db\ActiveRecord
     {
         return $this->hasOne(File::className(), ['id' => 'icon']);
     }
+
+    public function beforeSave($insert)
+    {
+        if (!$this->sort_order) {
+            $this->sort_order = "999";
+        }
+        return parent::beforeSave($insert); // TODO: Change the autogenerated stub
+    }
 }