from django.db import models class BaseModel(models.Model): created_at = models.DateTimeField(blank=True, null=True, auto_now_add=True) updated_at = models.DateTimeField(blank=True, null=True, auto_now=True) active = models.BooleanField(default=True) class Meta: abstract = True class MailingList(BaseModel): email = models.EmailField(max_length=254, blank=False, null=False)