From d886d3f0e0b55614c9dea0e2674d983870190b41 Mon Sep 17 00:00:00 2001
From: Dominik George <dominik.george@teckids.org>
Date: Mon, 2 Sep 2019 22:44:59 +0200
Subject: [PATCH] Fix group list concatenation.

---
 biscuit/apps/alsijil/views.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/biscuit/apps/alsijil/views.py b/biscuit/apps/alsijil/views.py
index d5db8e064..a56333cb6 100644
--- a/biscuit/apps/alsijil/views.py
+++ b/biscuit/apps/alsijil/views.py
@@ -81,7 +81,7 @@ def group_week(request: HttpRequest, week: Optional[int] = None) -> HttpResponse
 
     periods_by_day_unsorted = {}
     if group:
-        for act_group in [group] + group.child_groups.all():
+        for act_group in [group] + list(group.child_groups.all()):
             for lesson in act_group.lessons.filter(date_start__lte=week_start, date_end__gte=week_end):
                 for lesson_period in lesson.lesson_periods.all():
                     periods_by_day_unsorted.setdefault(
-- 
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