From 4cf4e3805c4d0a217fa6232ba1d6ee3a68c86ed2 Mon Sep 17 00:00:00 2001
From: Ryan Ye <yejianye@gmail.com>
Date: Thu, 13 Oct 2016 04:51:40 +0800
Subject: [PATCH] Bugfix when there's only date filter in FilterBox (no
 groupby) (#1326)

---
 caravel/viz.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/caravel/viz.py b/caravel/viz.py
index 6cd9db366b..e384ec4d90 100755
--- a/caravel/viz.py
+++ b/caravel/viz.py
@@ -1655,6 +1655,7 @@ class FilterBoxViz(BaseViz):
         'groupby': {
             'label': _('Filter fields'),
             'description': _("The fields you want to filter on"),
+            'default': [],
         },
     }