How to determine if a record is just created or updated in after_save

Question

The #new_record? function determines if a record has been saved. But it is always false in the after_save hook. Is there a way to determine whether the record i

Answer 1

I like to be specific even I aware that :id shouldn't change in normal, but

(byebug) id_change.first.nil?
true

It always cheaper to be specific instead finding very weird unexpected bug.

The same way if I expect true flag from untrustworthy argument

def foo?(flag)
  flag == true
end

This saves a lot of hours to not sitting on weird bugs.