Synnefo

class FloatingIP(models.Model):

    userid = models.CharField("UUID of the owner", max_length=128,

                              null=False, db_index=True)

    ipv4 = models.IPAddressField(null=False, unique=True, db_index=True)

    network = models.ForeignKey(Network, related_name="floating_ips",

                                null=False)

    machine = models.ForeignKey(VirtualMachine, related_name="floating_ips",

                                null=True)

    created = models.DateTimeField(auto_now_add=True)

    deleted = models.BooleanField(default=False, null=False)

    serial = models.ForeignKey(QuotaHolderSerial,

                               related_name="floating_ips", null=True)

    objects = ForUpdateManager()

    def __unicode__(self):

        return "<%s@%s>" % (self.ipv4, self.network.id)

    def in_use(self):

        if self.machine is None:

            return False

        else:

            return (not self.machine.deleted)