By upgrading rails from 4.2.1 to 5.1.0 getting deprecation warning on using as status_changed? DEPRECATION WARNING: The behavior of attribute_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_change_to_attribute? instead. I don't want to replace on in my project . I think should override method. Anybody knows how to do it. Please help