Fix AbsencesForPersonsCreateMutation

id -> pk
datetime.now needs timezone
get_or_create instead of just create -> could be called several times
ParticipationStatus is a CalendarEvent -> more args

aleksis/apps/alsijil/schema/absences.py

@@ -39,9 +39,9 @@ class AbsencesForPersonsCreateMutation(graphene.Mutation):
             # Create doc for dummies that are already in the past
             future = False
             for dummy in dummies:
-                lesson_event, dummy_start, dummy_end = Documentation.parse_dummy(dummy.id)
+                lesson_event, dummy_start, dummy_end = Documentation.parse_dummy(dummy.pk)
 
-                if dummy_start < datetime.now():
+                if dummy_start < datetime.now(dummy_start.tzinfo):
                     # In the past -> Create a Documentation
                     docs.append(
                         Documentation.create_from_lesson_event(
@@ -57,19 +57,22 @@ class AbsencesForPersonsCreateMutation(graphene.Mutation):
             # Create a ParticipationStatus for each documentation
             for doc in docs:
                 # Set person & absence_reason directly from id
-                ParticipationStatus.objects.create(
+                ParticipationStatus.objects.get_or_create(
                     person_id=person,
                     related_documentation=doc,
                     absence_reason_id=reason,
+                    datetime_start=doc.datetime_start,
+                    datetime_end=doc.datetime_end,
+                    timezone=doc.timezone,
                 )
 
             # If there are still dummy documentations in the future
             # create a Kolego Absence
             if future:
                 # TODO: Are date_start & date_end from CalendarEvent enough
-                #       or more needed?
+                #       or is time needed?
                 # Set reason & person directly from id
-                Absence.objects.create(
+                Absence.objects.get_or_create(
                     date_start=datetime.now().date(),
                     date_end=end,
                     reason_id=reason,