From a3943e55d7a6dd7e07df61a69798dcb3d4f1a60b Mon Sep 17 00:00:00 2001
From: Emmanuel Cazenave <ecazenave@entrouvert.com>
Date: Tue, 31 Jul 2018 14:22:47 +0200
Subject: [PATCH] django 1.11: adapt PickerWidgetMixin (#21489)

https://code.djangoproject.com/ticket/15667
django commit: b52c73008a9d67e9ddbb841872dc15cdd3d6ee01
---
 src/authentic2/forms/widgets.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/authentic2/forms/widgets.py b/src/authentic2/forms/widgets.py
index 7c63a8b96..c3d1dda25 100644
--- a/src/authentic2/forms/widgets.py
+++ b/src/authentic2/forms/widgets.py
@@ -105,6 +105,7 @@ class PickerWidgetMixin(object):
         return format
 
     def render(self, name, value, attrs=None):
+        attrs = attrs or {}
         final_attrs = self.build_attrs(attrs)
         final_attrs['class'] = "controls input-append date"
         rendered_widget = super(PickerWidgetMixin, self).render(name, value, final_attrs)