no message

@@ -134,7 +134,7 @@
             var loading = layer.load(1, {shade: [0.1, '#fff']});
             $.post("{:url('Comment/addcommit')}", data.field, function (res) {
                 layer.close(loading);
-                alert(res);
+                alert(JSON.stringify(res));
                 /*if (res.code == 1) {
                     layer.msg(res.msg, {time: 1000, icon: 1}, function () {
                         location.href = "{:url('CommentList')}";