Track a field change in a model?

Question

Django

It is necessary to hang up a signal on changes of a field of tables. Can anyone tell me if anyone had a similar problem and how did you end up solving it? So far, just hang up on presave and compare the value of the instance with the value in the database, but I don’t really want to make an extra request.

Answer 1

savings on matches - do it on request

Answer 2

So django.db.models.signals.pre_save and update_fields