class AbstractBaseModel(peewee.Model):
    uuid = peewee.UUIDField(default=uuid4)
    is_active = peewee.BooleanField(default=False)
    is_deleted = peewee.BooleanField(default=False)
    created_at = peewee.DateTimeField(default=datetime.now)
    updated_at = peewee.DateTimeField(default=datetime.now)
    deleted_at = peewee.DateTimeField(null=True)

    class Meta:
        abstract = True
        indexes = (
            (('is_active', 'is_deleted'), False),
        )