From 352087da1dfc12477dc90c11b9c009850e19cdf6 Mon Sep 17 00:00:00 2001
From: Dominik George <nik@naturalnet.de>
Date: Sun, 15 Sep 2019 21:49:58 +0200
Subject: [PATCH] Add code gone missing by copy/paste error.

---
 biscuit/apps/chronos/views.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/biscuit/apps/chronos/views.py b/biscuit/apps/chronos/views.py
index 0cb79886..060616f2 100644
--- a/biscuit/apps/chronos/views.py
+++ b/biscuit/apps/chronos/views.py
@@ -145,6 +145,8 @@ def lessons_day(request: HttpRequest, when: Optional[str] = None) -> HttpRespons
 def edit_substitution(request: HttpRequest, id_: int, week: int) -> HttpResponse:
     context = {}
 
+    lesson_period = get_object_or_404(LessonPeriod, pk=id_)
+    wanted_week = lesson_period.lesson.get_calendar_week(week)
 
     lesson_substitution = LessonSubstitution.objects.filter(
         week=wanted_week.week, lesson_period=lesson_period).first()
-- 
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