fix bug

application/api/controller/Community.php

@@ -79,7 +79,7 @@ class Community extends Api
             $query->where($item[0], $item[1], $item[2]);
         }
         $paginate = $query
-//            ->order("create_time", "DESC")
+            ->order("createtime", "DESC")
             ->page($params["page"])
             ->paginate($params["size"]);
         $items = collection($paginate->items())->toArray();