What are Django signals and how do they compare to alternatives?

What are Django signals and how do they work?

Django signals are a way to allow decoupled applications to get notified when certain actions occur elsewhere in the application. They are used to send notifications when events happen, like saving a model instance.

What are some alternatives to Django signals?

Some alternatives to Django signals include using direct method calls, middleware, or event-driven architectures like Celery for handling asynchronous tasks.

When should I use Django signals instead of alternatives?

You should use Django signals when you need to decouple components and want to trigger actions in response to specific events without tightly coupling your code.

Can you give an example of using Django signals?

Sure! For example, you can use the post_save signal to automatically send a welcome email to a user after they register.