Automatically link SpecialTransactions and their proxies

apps/treasury/signals.py

@@ -0,0 +1,12 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from treasury.models import SpecialTransactionProxy
+
+
+def save_special_transaction(instance, created, **kwargs):
+    """
+    When a special transaction is created, we create its linked proxy
+    """
+    if created:
+        SpecialTransactionProxy.objects.create(transaction=instance, remittance=None).save()