In a django model custom save() method, how should you identify a new object?

Question

I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.)

Is the check for (self.id != None) necessary and sufficient to guarantee the self record is new and not being updated? Any special cases this might overlook?

Answer 1

Alternative way to checking self.pk we can check self._state of the model

self._state.adding is True creating

self._state.adding is False updating

I got it from this page