code: def get_original(self):
          
          pk_value = self._get_pk_value()
  
          if isinstance(pk_value, int) and not self._original:
              self._original = (
                  self.select().where(self.__class__.id == pk_value).get()
              )
  
          return self._original
docs: Get the original instance of this instance before it's updated.
  
          Returns:
              fleaker.peewee.EventMixin:
                  The original instance of the model.