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- from django.db.models.signals import post_save
- from signals import do_something
- class TransactionAdmin(models.Model):
- ...
- post_save.connect(do_something, sender=TransactionAdmin)
- def do_something(sender, instance, created, *args, **kwargs):
- if created and sender == TransactionAdmin:
- ...
- ...
- def save_related(self,request,form,formsets,change):
- form.save_m2m()
- debtors = form.instance.debtors.all()
- n_debtors = debtors.count()
- creditor = form.instance.creditor
- value = form.instance.value
- if form.instance.split:
- value = value/(n_debtors + 1)
- for debtor in debtors:
- p = Person.objects.get(id = debtor.id)
- p.balance = p.balance - value
- p.save()
- p = Person.objects.get(id = creditor.id)
- p.balance = p.balance + n_debtors*value
- p.save()
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