nk20/apps/treasury/signals.py

# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from treasury.models import SpecialTransactionProxy, RemittanceType


def save_special_transaction(instance, created, **kwargs):
    """
    When a special transaction is created, we create its linked proxy
    """

    if not hasattr(instance, "_no_signal"):
        if instance.is_credit():
            if created and RemittanceType.objects.filter(note=instance.source).exists():
                SpecialTransactionProxy.objects.create(transaction=instance, remittance=None).save()
        else:
            if created and RemittanceType.objects.filter(note=instance.destination).exists():
                SpecialTransactionProxy.objects.create(transaction=instance, remittance=None).save()