How do Django ORM signals work with bulk operations?

How do Django ORM signals work with bulk operations?

Django ORM signals allow you to hook into various points in the lifecycle of your models. However, when it comes to bulk operations like bulk_create or bulk_update, signals such as pre_save or post_save are not triggered. This is because these operations are designed to be efficient and bypass the usual save methods.

So, if I want to perform actions after a bulk operation, what can I do?

You can manually trigger your desired actions after the bulk operation. For example, you can call a function right after your bulk_create or bulk_update to handle any necessary logic.

Can you give me an example of how to do that?

Sure! After your bulk_create, you could do something like this:

new_objects = MyModel.objects.bulk_create([...])
my_custom_function(new_objects)

This way, you can process the newly created objects as needed.

What about using signals with individual saves instead?

Yes, using individual saves will trigger the signals. If you need to use signals, consider iterating over your objects and saving them one by one, but keep in mind this may impact performance.