What are the limitations of bulk updates in Django ORM?

What are the limitations of bulk updates in Django ORM?

Bulk updates in Django ORM can be efficient, but they have some limitations. For instance, they don't call the save() method on each instance, which means signals like pre_save and post_save won't be triggered. Additionally, you can't use bulk_update with fields that have default values or with related fields.

Can I use bulk updates with related models?

No, bulk updates in Django ORM do not support updating related models directly. You would need to update related models individually or use a different approach.

What happens if I try to bulk update a model with a default value?

If you try to bulk update a model with a field that has a default value, Django will not apply the default value during the bulk update. You need to explicitly set the value for that field in your update.

Are there any performance considerations I should be aware of?

Yes, while bulk updates are generally faster than updating instances one by one, you should be cautious with very large datasets. It can lead to database locks or performance degradation if not managed properly.