django-orchestra-test/orchestra/contrib/orders/signals.py

40 lines
1.7 KiB
Python

from django.db.models.signals import post_delete, post_save
from django.dispatch import receiver
from orchestra.core import services
from . import helpers, settings
from .models import Order
# TODO perhas use cache = caches.get_request_cache() to cache an account delete and don't processes get_related_objects() if the case
# FIXME https://code.djangoproject.com/ticket/24576
# TODO build a cache hash table {model: related, model: None}
@receiver(post_delete, dispatch_uid="orders.cancel_orders")
def cancel_orders(sender, **kwargs):
if sender._meta.app_label not in settings.ORDERS_EXCLUDED_APPS:
instance = kwargs['instance']
# Account delete will delete all related orders, no need to maintain order consistency
if isinstance(instance, Order.account.field.rel.to):
return
if type(instance) in services:
for order in Order.objects.by_object(instance).active():
order.cancel()
elif not hasattr(instance, 'account'):
# FIXME Indeterminate behaviour
related = helpers.get_related_object(instance)
if related and related != instance:
type(related).objects.get(pk=related.pk)
@receiver(post_save, dispatch_uid="orders.update_orders")
def update_orders(sender, **kwargs):
if sender._meta.app_label not in settings.ORDERS_EXCLUDED_APPS:
instance = kwargs['instance']
if type(instance) in services:
Order.objects.update_by_instance(instance)
elif not hasattr(instance, 'account'):
related = helpers.get_related_object(instance)
if related and related != instance:
Order.objects.update_by_instance(related)