fix(Query): correct addDesceding to return this (#351)

leeyeh · wangxiao · commit 228bc9bd9520 · 2016-08-17T10:51:55.000+08:00
diff --git a/src/query.js b/src/query.js
@@ -746,7 +746,7 @@ module.exports = function(AV) {
        this._order += ',-' + key;
      else
        this._order = '-' + key;
-     return key;
+     return this;
    },
 
     /**
