From b7f7845bbb7d9e395fd9f68de3a5ae1464306b8a Mon Sep 17 00:00:00 2001
From: Dmitry <nerosketch@gmail.com>
Date: Thu, 11 May 2017 01:35:56 +0300
Subject: [PATCH] fix bug

---
 abonapp/templates/abonapp/charts.html | 4 ++++
 abonapp/views.py                      | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/abonapp/templates/abonapp/charts.html b/abonapp/templates/abonapp/charts.html
index 7c9373e..1be60c3 100644
--- a/abonapp/templates/abonapp/charts.html
+++ b/abonapp/templates/abonapp/charts.html
@@ -9,6 +9,7 @@
                     <h3 class="panel-title">График использования</h3>
                 </div>
                 <div class="panel-body">
+                    {% if charts_data %}
                     <canvas id="netChart" width="300" height="100"></canvas>
                     <script type="text/javascript">
                         var myChart = new Chart('netChart', {
@@ -43,6 +44,9 @@
                             }
                         });
                     </script>
+                    {% else %}
+                    <h2>Данные не переданы</h2>
+                    {% endif %}
                 </div>
             </div>
         </div>
diff --git a/abonapp/views.py b/abonapp/views.py
index 823b248..c9d81c5 100644
--- a/abonapp/views.py
+++ b/abonapp/views.py
@@ -745,7 +745,7 @@ def charts(request, gid, uid):
     return render(request, 'abonapp/charts.html', {
         'abon_group': abongroup,
         'abon': abon,
-        'charts_data': ','.join(charts_data),
+        'charts_data': ','.join(charts_data) if charts_data is not None else None,
         'time_min': int(midnight.timestamp()),
         'time_max': int((midnight + timedelta(hours=23, minutes=59, seconds=59)).timestamp())
     })