Django Signals

Use cases

Permissions: post_save --> assign to "Superuser" role

models.py

from django.db.models.signals import pre_save
from django.dispatch import receiver


@receiver(pre_save, sender=Comment)
def do_something_on_save(sender, instance, **kwargs):

    # previous value
    print(sender.objects.get(id=instance.id))
    # new value
    print(instance)

---

Last update: 2023-04-24