Made the selector for Agenda.groups() match that of Agenda.area_list() by adding parent__isnull=False. Without this, the two won't match if split by area. Fixes issue ietf-tools#1607.

 - Legacy-Id: 9108

Author: levkowetz

ietf/meeting/models.py

@@ -626,7 +626,8 @@ def area_list(self):
                  .distinct() )
 
     def groups(self):
-        return Group.objects.filter(type__slug__in=['wg', 'rg', 'ag', 'iab'], session__scheduledsession__schedule=self).distinct().order_by('parent__acronym', 'acronym')
+        return Group.objects.filter(type__slug__in=['wg', 'rg', 'ag', 'iab'], parent__isnull=False,
+            session__scheduledsession__schedule=self).distinct().order_by('parent__acronym', 'acronym')
 
     # calculate badness of entire schedule
     def calc_badness(self):