update

app/common/model/Category.php

@@ -107,6 +107,10 @@ class Category extends BaseModel
         }
         isset($params['store_id']) && $params['store_id'] > -1 && $filter[] = ['store_id', '=', (int)$params['store_id']];
 
+         if (isset($param['category_id']) && $param['category_id'] != "") {
+            $filter[] = ['parent_id', '=', $params['category_id']];
+        }
+
         // 查询列表数据
         return $this->with(['image'])
             ->where($filter)