From 6c92fa471d23196e3e319fbfb82728ef18e38386 Mon Sep 17 00:00:00 2001
From: Maxime Beauchemin <maximebeauchemin@gmail.com>
Date: Mon, 11 Jan 2016 14:42:45 -0800
Subject: [PATCH] some error handling for WordCloud

---
 panoramix/viz.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/panoramix/viz.py b/panoramix/viz.py
index 819b9044e5..93d98dc683 100644
--- a/panoramix/viz.py
+++ b/panoramix/viz.py
@@ -445,6 +445,9 @@ class WordCloudViz(BaseViz):
 
     def query_obj(self):
         d = super(WordCloudViz, self).query_obj()
+        if len(d['groupby']) < 1:
+            raise Exception("Pick at least one field to group by")
+
         metric = self.form_data.get('metric')
         if not metric:
             raise Exception("Pick a metric!")