models.py

    def generate_random_codes(self):
        """
        Used to generate random key/secret pairings.
        Use this after you've added the other data in place of save().
        """
        key = generate_random(length=KEY_SIZE)
        secret = generate_random(length=SECRET_SIZE)
        while Consumer.objects.filter(key__exact=key, secret__exact=secret).count():
            secret = generate_random(length=SECRET_SIZE)
        self.key = key
        self.secret = secret
        self.save()