From 089a8c677cc911e62880c8a29d28e835adc3c707 Mon Sep 17 00:00:00 2001
From: Maxime Beauchemin <maximebeauchemin@gmail.com>
Date: Tue, 12 Jan 2016 12:06:34 -0800
Subject: [PATCH] [hotfix] no data

---
 panoramix/models.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/panoramix/models.py b/panoramix/models.py
index 24e94518ac3cb..157721ce2b79b 100644
--- a/panoramix/models.py
+++ b/panoramix/models.py
@@ -916,8 +916,8 @@ def query(
         client.groupby(**qry)
         query_str += json.dumps(client.query_dict, indent=2)
         df = client.export_pandas()
-        if not df:
-            raise Exception("No data")
+        if df is None or df.size == 0:
+            raise Exception("No data was returned.")
 
         if not is_timeseries and 'timestamp' in df.columns:
             del df['timestamp']