Updated qrahpql query timeline

www/protected/controllers/JCouponController.php

@@ -60,7 +60,7 @@ class JCouponController extends AdminController
         if ($search) {
             $criteria->addCond('coupon_coding','or',new MongoRegex('/' . $search . '/'));
         }
-        $criteria->sort('created_at',EMongoCriteria::SORT_DESC);
+        $criteria->sort('coupon_coding',EMongoCriteria::SORT_DESC);
         $cursor = JCoupon::model()->findAll($criteria);
         $rows = CommonFn::getRowsFromCursor($cursor);
         $parsedRows = JCoupon::model()->parse($rows);