django abstract UUidModel , add uuid field in django model

gistfile1.txt

class UUidModel(models.Model):
    import uuid
    uid = models.UUIDField(default=uuid.uuid4, editable=False)

    class Meta:
        abstract = True

    def save(self, *args, **kwargs):
        if not self.pk:
            self.uid = uuid.uuid4()
        super().save(*args, **kwargs)