prozorro_sale.auction.models.__init__

    # TODO: add validation bid status is_valid.
    # Issue: https://gitlab.prozorro.sale/prozorro-sale/auction/-/issues/201
    """
    Base bid value model
    """
    id = types.StringType(metadata={'description': 'Bid ID'})
    amount = types.DecimalIntegerType(metadata={'description': 'Amount'})
    datePublished = types.UTCDateTimeType(metadata={'readOnly': True, 'description': 'Bid date'},
                                          default=dt_now)

    class Options: