1 files changed, 9 insertions, 0 deletions
diff --git a/views.py b/views.py
index 9c38524..7c19840 100644
--- a/views.py
+++ b/views.py
@@ -17,6 +17,7 @@ import datetime
 
 from django.conf import settings
 from django.db.models import Max
+from django.db.models.functions import Length
 from django.http import Http404
 from django.shortcuts import get_object_or_404, render
 
@@ -95,5 +96,13 @@ def timetable(request, year_slug, timetable_slug, group_slug, year=None, week=No
                                               "year": year, "week": int(week),
                                               "is_old_timetable": is_old_timetable})
 
+def calendars(request, year_slug, timetable_slug, group_slug):
+    group = get_object_or_404(Group, timetable__year__slug=year_slug,
+                              timetable__slug=timetable_slug, slug=group_slug)
+    groups = Group.objects.get_parents(group).annotate(length=Length("subgroup")) \
+                                             .order_by("length")
+
+    return render(request, "calendars.html", {"group": group, "groups": groups})
+
 def contact(request):
     return render(request, "contact.html", {"email": settings.ADMINS[0][1]})