From 327fceefb763fdff1b2c072cd2e52ce586da7421 Mon Sep 17 00:00:00 2001
From: Maxime Beauchemin <maxime.beauchemin@apache.org>
Date: Sat, 11 Jun 2016 08:02:56 -0700
Subject: [PATCH] [hotfix] fixes issue around multidict

---
 caravel/viz.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/caravel/viz.py b/caravel/viz.py
index 52bae4cff6..6286b65219 100644
--- a/caravel/viz.py
+++ b/caravel/viz.py
@@ -115,8 +115,14 @@ class BaseViz(object):
             if d[key] is False:
                 del d[key]
             else:
-                for v in d.getlist(key):
-                    od.add(key, v)
+                if isinstance(d, MultiDict):
+                    v = d.getlist(key)
+                else:
+                    v = d.get(key)
+                if not isinstance(v, list):
+                    v = [v]
+                for item in sorted(v):
+                    od.add(key, item)
         href = Href(
             '/caravel/explore/{self.datasource.type}/'
             '{self.datasource.id}/'.format(**locals()))