The behavior of `changed` inside of after callbacks will be changing in the next version of Rails
Revisar ls métodos changed de clases active record:
DEPRECATION WARNING: The behavior of `changed` inside of after callbacks will be changing in the next version of Rails.
The new return value will reflect the behavior of calling the method after `save` returned (e.g. the opposite of what it returns now).
To maintain the current behavior, use `saved_changes.keys` instead. (called from auditar_modificaciones at /home/sramos/devel/gong/gor/app/models/concerns/auditable.rb:39)
Edited by Santiago Ramos