FIx name clash.

biscuit/apps/alsijil/model_extensions.py

@@ -48,7 +48,7 @@ def mark_absent(self, day: date, starting_period: Optional[int] = 0, absent=True
 
 
 @LessonPeriod.method
-def personal_notes(self, wanted_week: CalendarWeek):
+def get_personal_notes(self, wanted_week: CalendarWeek):
     # Find all persons in the associated groups that do not yet have a personal note for this lesson
     missing_persons = Person.objects.annotate(
         no_personal_notes=~Exists(PersonalNote.objects.filter(

biscuit/apps/alsijil/views.py

@@ -50,7 +50,7 @@ def lesson(request: HttpRequest, year: Optional[int] = None, week: Optional[int]
 
 
     # Create a formset that holds all personal notes for all persons in this lesson
-    persons_qs = lesson_period.personal_notes(wanted_week)
+    persons_qs = lesson_period.get_personal_notes(wanted_week)
     personal_note_formset = PersonalNoteFormSet(
         request.POST or None, queryset=persons_qs, prefix='personal_notes')