What are some examples of callbacks in Django?

What are some examples of callbacks in Django?

In Django, callbacks are often used in signals. For example, you can use the post_save signal to trigger a function after a model instance is saved.

Can you give me a specific code example?

Sure! 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_callback(sender, instance, created, **kwargs):
    if created:
        print('A new instance was created!')

What other types of signals are there?

Django provides several built-in signals like pre_save, post_delete, and m2m_changed, which can be used for various events.

How can I connect these signals to my models?

You can connect signals by using the @receiver decorator, as shown in the previous example, or by connecting them manually using signal.connect().