Add signal: order_split

doc/development/api/general.rst

@@ -20,7 +20,7 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
-   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download
+   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split
 
 Frontend
 --------

src/pretix/base/services/orders.py

@@ -49,7 +49,7 @@ from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import (
     allow_ticket_download, order_approved, order_canceled, order_changed,
     order_denied, order_expired, order_fee_calculation, order_placed,
-    periodic_task, validate_order,
+    order_split, periodic_task, validate_order,
 )
 from pretix.celery_app import app
 from pretix.helpers.models import modelcopy
@@ -1457,6 +1457,8 @@ class OrderChangeManager:
 
         if split_order.total != Decimal('0.00') and self.order.invoices.filter(is_cancellation=False).last():
             generate_invoice(split_order)
+
+        order_split.send(sender=self.order.event, original=self.order, split_order=split_order)
         return split_order
 
     @cached_property

src/pretix/base/signals.py

@@ -556,3 +556,11 @@ into account.
 system really bad.** Also, keep in mind that your response is subject to caching and out-of-date
 quotas might be used for display (not for actual order processing).
 """
+
+order_split = EventPluginSignal(
+    providing_args=["original", "split_order"]
+)
+"""
+This signal is sent out when an order is split into two orders and allows you to copy related models
+to the new order. You will be passed the old order as ``original`` and the new order as ``split_order``.
+"""