class BookingTransactionCorp(BookingTransaction):

    class Meta:
        proxy = True
        verbose_name = u'Операция с бронью (корп.)'
        verbose_name_plural = u'Операции с бронями (корп.)'


class Session(GDSDependent):

    ip = models.CharField(max_length=15, null=True, blank=True)
    uid = models.CharField(max_length=32)
    cookie = models.TextField(null=True, blank=True)
    expiry_date = models.DateTimeField(null=True, blank=True)
    # gds_type = GDSDependent.gds_type

    def __unicode__(self):