def pre_save_callback(sender, **kwargs): """ Event changes to user preferences. """ user_preference = kwargs["instance"] user_preference._old_value = get_changed_fields_dict( user_preference, sender).get("value", None)
def pre_save_callback(sender, **kwargs): """ Event changes to user preferences. """ user_preference = kwargs["instance"] user_preference._old_value = get_changed_fields_dict(user_preference, sender).get("value", None)