How to generate a unique 9 digit random id for every registered user?

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yashwanth .k

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Oct 4, 2019, 10:51:52 AM10/4/19
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Hello,

My model consists of user details such as username and his id which is auto-generated by DB(indexing). 
Apart from this, I need to assign a random unique 9 digit number for every user.
The reason for assigning a random number to a registered user is to search a particular user using his permanent random id which we have generated.

Solutions with the model description will be very helpful.


Thank you!

Aldian Fazrihady

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Oct 4, 2019, 11:12:09 AM10/4/19
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import random
import string

from django.db import models


def generate_random_code():
    return ''.join(random.choices(string.ascii_uppercase + string.digits, k=9))


class MyModel(models.Model):
    code = models.CharField(
        max_length=9, default=generate_random_code, db_index=True
    )
Hi, please try the code above.
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Regards,

Jani Tiainen

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Oct 4, 2019, 11:54:51 AM10/4/19
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Note that above solution doesn't guarantee unique id. As it is a problem of any pseudorandom generator.

So it is possible (but unlikely) that insertion fails.

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAN7EoAYykEHF8qxAEc%2BPh71ue%3DKLzpT3P5MuE2Dw58gG2HmUEw%40mail.gmail.com.

Suraj Thapa FC

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Oct 4, 2019, 11:59:54 PM10/4/19
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Use uuid 

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אורי‎

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Oct 5, 2019, 12:11:22 AM10/5/19
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Hi,

In Speedy Net we generate a unique random ID with 15 digits and this is used as the table's primary key. We don't use the DB's auto-generated ID.

The first digit of the random ID we generate is never zero.

 

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yashwanth .k

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Oct 5, 2019, 1:59:05 AM10/5/19
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Hello Aldian Fazrihady, 
Your code is working, 
How to link this code to my user so that when I search the code I should grab user profile.
Thank you so much for sharing the approach.

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAN7EoAYykEHF8qxAEc%2BPh71ue%3DKLzpT3P5MuE2Dw58gG2HmUEw%40mail.gmail.com.

yashwanth .k

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Oct 5, 2019, 2:01:54 AM10/5/19
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Hello Uri, 
Thank you soo much,
your work made my work easy.
Thank you!

On Saturday, October 5, 2019 at 9:41:22 AM UTC+5:30, Uri wrote:
Hi,

In Speedy Net we generate a unique random ID with 15 digits and this is used as the table's primary key. We don't use the DB's auto-generated ID.

The first digit of the random ID we generate is never zero.

 

On Fri, Oct 4, 2019 at 5:53 PM yashwanth .k <kyashw...@gmail.com> wrote:
Hello,

My model consists of user details such as username and his id which is auto-generated by DB(indexing). 
Apart from this, I need to assign a random unique 9 digit number for every user.
The reason for assigning a random number to a registered user is to search a particular user using his permanent random id which we have generated.

Solutions with the model description will be very helpful.


Thank you!

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