Merge pull request xtrinch#100 from AlexisCaffa/patch-1

KeyError bug fixed when update

Author: xtrinch

fcm_django/api/rest_framework.py

@@ -64,7 +64,7 @@ def validate(self, attrs):
                 devices = Device.objects.filter(
                     registration_id=attrs["registration_id"]) \
                     .exclude(id=primary_key)
-                if (attrs["active"]):
+                if (attrs.get('active', False)):
                     devices.filter(~Q(user=user)).update(active=False)
                 devices = devices.filter(user=user)
             else: