Merged in [17484] from valery@smyslov.net:

When requesting a new WG session, and retrieving information about the previous session, look back to the previous time the group met, instead of simply checking the previous IETF meeting and maybe not finding any information to retrieve.
 - Legacy-Id: 17504
Note: SVN reference [17484] has been migrated to Git commit 88f1166

Author: levkowetz

ietf/secr/sreq/views.py

@@ -594,10 +594,17 @@ def new(request, acronym):
     # the "previous" querystring causes the form to be returned
     # pre-populated with data from last meeeting's session request
     elif request.method == 'GET' and 'previous' in request.GET:
-        previous_meeting = Meeting.objects.get(number=str(int(meeting.number) - 1))
-        previous_sessions = add_event_info_to_session_qs(Session.objects.filter(meeting=previous_meeting, group=group)).exclude(current_status__in=['notmeet', 'deleted']).order_by('id')
-        if not previous_sessions:
-            messages.warning(request, 'This group did not meet at %s' % previous_meeting)
+        latest_session = add_event_info_to_session_qs(Session.objects.filter(meeting__type_id='ietf', group=group)).exclude(current_status__in=['notmeet', 'deleted', 'canceled',]).order_by('-meeting__date').first()
+        if latest_session:
+            previous_meeting = Meeting.objects.get(number=latest_session.meeting.number)
+            previous_sessions = add_event_info_to_session_qs(Session.objects.filter(meeting=previous_meeting, group=group)).exclude(current_status__in=['notmeet', 'deleted']).order_by('id')
+            if not previous_sessions:
+                messages.warning(request, 'This group did not meet at %s' % previous_meeting)
+                return redirect('ietf.secr.sreq.views.new', acronym=acronym)
+            else:
+                messages.info(request, 'Fetched session info from %s' % previous_meeting)
+        else:
+            messages.warning(request, 'Did not find any previous meeting')
             return redirect('ietf.secr.sreq.views.new', acronym=acronym)
 
         initial = get_initial_session(previous_sessions, prune_conflicts=True)