gistfile1.py

class URL(models.Model):
    id = models.ItemName()
    url = models.Field(required=True)
    views = models.NumberField(required=True, default=0)

    class Meta:
        connection = simpledb.SimpleDB(settings.AWS_KEY, settings.AWS_SECRET)
        domain = 'shortener_url'

    def save(self):
        next = URLSequence.next()
        shorten = BaseConverter(SHORTENER_DIGITS)
        print next
        short_id = shorten.from_decimal(next)
        print short_id
        self.id = short_id
        super(URL, self).save()