Use of change_default attribute. Example. 'zip': fields.char('Zip', change_default=True, size=24), By default value of change_default is False, If change_default=True then while setting default value on any field we can make that field dependent on value of the other field of the same object which has change_default=True. Here is the video to explain the functionality.
Thanks to post this.
Very good memento, indeed! You wouldn't happen to have this diagram with a better definition by any chance?
I will try to define this diagram with some textual description or video presentation soon.