Generate a unique random string in Django without the need for UUID or database locks

unique_random.py

## this seems not good, but it's a shortcut
## you really shouldn't use this, k?
## uses the django make_random_password function

def unique_rand():
    from django.contrib.auth.models import User
    from .models import Whatever
    #while True:
    for _ in range(10):
        code = User.objects.make_random_password(length=50)
        logger.debug ('secret generated code is %s' % code)
        if not Whatever.objects.filter(secret_unique_storage_filename=code).exists():
            return code
        else:
            logger.error ("unique_rand here, looks like this aint gonna work.  Couldn't find one secret enough...")