Django/Python 从 UUID 生成唯一的礼品卡代码

Question

I'm using Django and into a my model I'm using UUID v4 as primary key.

I'm using this UUID to generate a Qrcode used for a sort of giftcard.

Now the customer requests to have also a giftcard code using 10 characters to have a possibility to acquire the giftcard using the Qrcode (using the current version based on the UUID) as also the possibility to inter manually the giftcard code (to digit 10 just characters).

Now I need to found a way to generate this gift code. Obviously this code most be unique.

I found this article where the author suggest to use the auto-generaed id (integer id) into the generate code (for example at the end of a random string). I'm not sure for this because I have only 10 characters: for long id basically I will fire some of available characters just to concatenate this unique section.

For example, if my id is 609234 I will have {random-string with length 4} + 609234 .

And also, I don't like this solution because I think it's not very sure, It's better to have a completely random code. There is a sort regular-format from malicious user point of view.

Do you know a way to generate an unique random string using, for example from an input unique key (in my case the UUIDv4)?

Otherwise, do you know some algorithm/approach to generate voucher codes?

Answer 1

import string
import secrets

unique_digits = string.digits
password = ''.join(secrets.choice(unique_digits) for i in range(6))

print(password)

The above code pallet generates a unique code of integers for the number of digits you want. In the above case, it will print a 6-digit unique Integer code. If it doesn't let me know, what exactly you want.