sendmail: Do not copy rules with subevent when closing an event (Z#23233683) (#6156)

src/pretix/plugins/sendmail/migrations/0011_remove_cross_event_scheduled_mails.py

@@ -0,0 +1,19 @@
+from django.db import migrations
+from django.db.models import F
+
+
+def remove_cross_event_scheduled_mails(apps, schema_editor):
+    Rule = apps.get_model("sendmail", "Rule")
+    ScheduledMail = apps.get_model("sendmail", "ScheduledMail")
+    ScheduledMail.objects.filter(rule__subevent__isnull=False).exclude(rule__subevent__event=F('rule__event')).delete()
+    Rule.objects.filter(subevent__isnull=False).exclude(subevent__event=F('event')).delete()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("sendmail", "0010_auto_20250801_1342"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_cross_event_scheduled_mails),
+    ]

src/pretix/plugins/sendmail/signals.py

@@ -232,7 +232,7 @@ def sendmail_copy_data_receiver(sender, other, item_map, **kwargs):
     if sender.sendmail_rules.exists():  # idempotency
         return
 
-    for r in other.sendmail_rules.prefetch_related('limit_products'):
+    for r in other.sendmail_rules.filter(subevent__isnull=True).prefetch_related('limit_products'):
         limit_products = list(r.limit_products.all())
         r = copy.copy(r)
         r.pk = None

src/tests/plugins/sendmail/test_rules.py

@@ -25,10 +25,11 @@ from zoneinfo import ZoneInfo
 
 import pytest
 from django.core import mail as djmail
+from django.db.models import F
 from django.utils.timezone import now
 from django_scopes import scopes_disabled
 
-from pretix.base.models import InvoiceAddress, Order
+from pretix.base.models import Event, InvoiceAddress, Order
 from pretix.base.services.checkin import perform_checkin
 from pretix.plugins.sendmail.models import Rule, ScheduledMail
 from pretix.plugins.sendmail.signals import sendmail_run_rules
@@ -687,3 +688,41 @@ def test_sendmail_context_localization(event, order, pos):
 
     sendmail_run_rules(None)
     assert "Hallo Herr Mustermann" in djmail.outbox[0].body
+
+
+@pytest.mark.django_db
+@scopes_disabled()
+def test_event_clone_ignores_rules_with_subevent(event, order, pos):
+    event.has_subevents = True
+    event.save()
+    se1 = event.subevents.create(name="subevent 1", date_from=dt_now)
+
+    event.sendmail_rules.create(date_is_absolute=False, send_offset_days=1, send_offset_time=datetime.time(hour=12),
+                                subject='Mail To Subevent', template='TestBody', subevent=se1)
+    event.sendmail_rules.create(date_is_absolute=False, send_offset_days=1, send_offset_time=datetime.time(hour=12),
+                                subject='Mail To All', template='TestBody')
+
+    assert event.sendmail_rules.count() == 2
+    assert event.scheduledmail_set.count() == 2
+    for rule in event.sendmail_rules.all():
+        assert rule.scheduledmail_set.count() == 1
+
+    copied_event = Event.objects.create(
+        organizer=event.organizer, name='Dummy2', slug='dummy2',
+        date_from=datetime.datetime(2022, 4, 15, 9, 0, 0, tzinfo=datetime.timezone.utc),
+        has_subevents=True
+    )
+    copied_event.copy_data_from(event)
+    copied_event.refresh_from_db()
+    event.refresh_from_db()
+
+    assert copied_event.sendmail_rules.count() == 1
+    assert copied_event.sendmail_rules.first().scheduledmail_set.count() == 0
+    assert str(copied_event.sendmail_rules.first().subject) == "Mail To All"
+
+    copied_event.subevents.create(name="subevent 1 in copied", date_from=dt_now)
+    assert copied_event.sendmail_rules.first().scheduledmail_set.count() == 1
+
+    # Double-Check: no scheduled mails and rules exist where subevent.event and event do not align
+    assert ScheduledMail.objects.filter(rule__subevent__isnull=False).exclude(rule__subevent__event=F('rule__event')).count() == 0
+    assert Rule.objects.filter(subevent__isnull=False).exclude(subevent__event=F('event')).count() == 0