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

Rails 5.1+ way:

user = User.new
user.save!
user.saved_change_to_attribute?(:id) # => true

Answer 2

Yet another option, for those who do have an updated_at timestamp:

if created_at == updated_at
  # it's a newly created record
end