Use atomic transaction

aleksis/apps/paweljong/schema/checkpoint.py

@@ -4,9 +4,9 @@ from django.utils import timezone
 import graphene
 from graphene_django import DjangoObjectType
 
+from aleksis.core.models import Person
 from aleksis.core.schema.base import PermissionsTypeMixin
 from aleksis.core.util.core_helpers import has_person
-from aleksis.core.models import Person
 
 from ..models import Checkpoint, Event
 

aleksis/apps/paweljong/schema/event_registration.py

+from django.db import transaction
 from django.contrib.auth.models import User
+from django.core.exceptions import ValidationError
 from django.utils.text import slugify
 from django.utils.translation import gettext as _
 
@@ -50,6 +52,7 @@ class SendEventRegistrationMutation(graphene.Mutation):
 
     ok = graphene.Boolean()
 
+    @transaction.atomic
     def mutate(self, info, event: graphene.ID, event_registration: EventRegistrationInputType, **kwargs):
         event = Event.objects.get(pk=event)
 
@@ -194,4 +197,5 @@ class SendEventRegistrationMutation(graphene.Mutation):
         if event_registration["retraction_consent"]:
             return SendEventRegistrationMutation(ok=True)
 
+        raise ValidationError(_("Retraction consent is required"))
         return SendEventRegistrationMutation(ok=False)