How do Django signals work with models?

Can you explain how Django signals work with models?

Sure! Django signals allow certain senders to notify a set of receivers when some action has taken place. For example, when a model instance is saved or deleted.

What are some common signals used in Django?

Common signals include pre_save, post_save, pre_delete, and post_delete. They help you execute code before or after these actions.

How do I connect a signal to a model?

You can connect a signal to a model by using the @receiver decorator. For example, you can connect a function to the post_save signal of a model.

Can you give me a code example?

Certainly! Here's a simple example:

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

@receiver(post_save, sender=MyModel)
def my_handler(sender, instance, created, **kwargs):
    if created:
        print('A new instance was created!')