Column in table as an object property- returns alert if not init

RuthlezzKick

Hi,
here is my setupTable.

var setupTable = function () {

    return $("#myTable").dataTable({  
        sAjaxSource: config.urls.ajaxSource,

        sSelectionMode: 'multipleCheckOnly',
        sDom: '<"$grid-toolbar"s>tr<"dataTables-footer"ilp>',

        aoColumns: [

                {
                    mData: "DeliveryAddress",
                    sWidth: "300px"
                },

                {
                    mData: "Title",
                    sWidth: "180px"
                },

                {
                    mData: "Quantity",
                    sWidth: "60px"
                },

                {
                    mData: "DeliveryAddressDetails.CityName",
                    bVisible: false,
                    bSearchable: false
                },

                {
                    mData: "DeliveryAddressDetails.ZipCode",
                    bVisible: false,
                    bSearchable: false,
                }
        ]

    });
};

ajax returns data with some object as a one of property (DeliveryAddressDetails)
but if my json result has a row with not set DeliveryAddressDetails
I get javascript alert

DataTables warring - requested unknown parameter
How to stop it ? in this case i would like to have just null or nothing in DeliveryAddressDetails.ZipCode and DeliveryAddressDetails.CityName column