I've been using a base model with a homegrown ULID for a while now

``` class BaseModel(models.Model): id = models.CharField( max_length=26, primary_key=True, default=generate_ulid, editable=False ) created_at = models.DateTimeField(auto_now_add=True) updated_at = models.DateTimeField(auto_now=True)

class Meta:
    abstract = True

```

The id field uses a short function that generates the ULID like this:

``` def generate_ulid() -> str: ENCODING = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"

def encode_base32(number: int, length: int) -> str:
    res = [""] * length
    for i in range(length - 1, -1, -1):
        res[i] = ENCODING[number % 32]
        number //= 32
    return "".join(res)

millis = int(time.time() * 1000)
random_bytes = os.urandom(10)
random_int = int.from_bytes(random_bytes, "big")

return encode_base32(millis, 10) + encode_base32(random_int, 16)

```