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Delete related common event when performance or reading is deleted #796

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9 changes: 8 additions & 1 deletion apps/afisha/models/events.py
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
from django.core.exceptions import ValidationError
from django.db import models
from django.db.models.signals import pre_save
from django.db.models.signals import post_delete, pre_save

from apps.afisha.models import Performance, Reading
from apps.core.models import BaseModel
Expand Down Expand Up @@ -127,5 +127,12 @@ def create_common_event(sender, instance, **kwargs):
instance.events_id = CommonEvent.objects.create().id


def delete_common_event(sender, instance, **kwargs):
if instance.events_id:
instance.events.delete()


pre_save.connect(create_common_event, sender=Reading)
pre_save.connect(create_common_event, sender=Performance)
post_delete.connect(delete_common_event, sender=Reading)
post_delete.connect(delete_common_event, sender=Performance)
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