Timestamped Models in PeeWee

peewee_timestamped_model.py

from peewee import *
import datetime

database = SqliteDatabase("/data/amazing_people.db", **{})


class BaseModel(Model):
    class Meta:
        database = database


class TimestampedModel(BaseModel):
    def save(self, *args, **kwargs):
    if self._get_pk_value() is None:
        # this is a create operation, set the date_created field
        self.date_created = datetime.datetime.now().strftime(
            "%Y-%m-%d %H:%M:%S")
    self.date_updated = datetime.datetime.now().strftime(
        "%Y-%m-%d %H:%M:%S")
    return super(TimestampedModel, self).save(*args, **kwargs)
        

class Person(TimestampedModel):
    name = TextField()
    date_created = DateTimeField()
    date_updated = DateTimeField()
    
    class Meta:
        db_table = 'person'

Sample code for implementing Timestamped Models in PeeWee. Accompanying blog post: https://blog.muya.co.ke/timestamped-model-in-peewee/

object has no _get_pk_value() attribute?
whats problem?