What are some use cases for callbacks in Django?

What are some use cases for callbacks in Django?

Callbacks in Django are often used for handling signals, such as when a model is saved or deleted. They can also be used for custom validation or to trigger actions after certain events.

Can you give me an example of a signal callback?

Sure! A common example is using the post_save signal to send a welcome email after a new user registers. You can connect a function to this signal that sends the email.

How do I connect a callback to a signal?

You can connect a callback to a signal using the @receiver decorator. For example, @receiver(post_save, sender=User) will connect your function to the post-save event of the User model.

What if I want to use multiple callbacks for the same signal?

You can connect multiple callbacks to the same signal by simply defining multiple functions with the @receiver decorator for the same signal.