Add transaction to grant update mutation

Author: estyxx

backend/api/grants/mutations.py

@@ -290,6 +290,7 @@ def send_grant(self, info: Info, input: SendGrantInput) -> SendGrantResult:
         return instance
 
     @strawberry.mutation(permission_classes=[IsAuthenticated])
+    @transaction.atomic
     def update_grant(self, info: Info, input: UpdateGrantInput) -> UpdateGrantResult:
         request = info.context.request
 
@@ -306,10 +307,10 @@ def update_grant(self, info: Info, input: UpdateGrantInput) -> UpdateGrantResult
         for attr, value in asdict(input).items():
             setattr(instance, attr, value)
 
-        create_change_admin_log_entry(request.user, instance, "Grant updated")
-
         instance.save()
 
+        create_change_admin_log_entry(request.user, instance, "Grant updated")
+
         Participant.objects.update_or_create(
             user_id=request.user.id,
             conference=instance.conference,

backend/reviews/tests/test_admin.py

@@ -717,8 +717,6 @@ def test_save_review_grants_two_times_does_not_create_duplicate_log_entries(rf,
         reimbursement.category for reimbursement in grant_1.reimbursements.all()
     } == {ticket_category, travel_category, accommodation_category}
 
-    for e in LogEntry.objects.all():
-        print(e.change_message)
     assert LogEntry.objects.count() == 4
     assert LogEntry.objects.filter(
         user=user,