Javascript jQuery数据表：回调函数（fnUpdate、fnCreatedCell等）不'；如果mData为空，则无法工作

我使用jQuery DataTable创建

数据网格。然而，我发现当mData的值为null时更新单元格有问题，如下代码所示：

var oTable = $("table#table_lookup").dataTable({
    "bLengthChange": false,
    "bFilter": false,
    "sPaginationType": "full_numbers",
    "aaData": data,
    "aoColumnDefs": [{ 
            "sTitle": "No.", 
            "mData": null,
            "aTargets": [0], 
            "bSortable": false,
            "fnCreatedCell": function (nTd, sData, oData, iRow, iCol) {
                $(nTd).text((iRow + 1));
            }],
    "bAutoWidth": false,
    "aaSorting": [[ 1, 'asc' ]]
});

有人能帮我解决这个问题吗
 为空时，需要指定可设置为空字符串的选项，如：

var oTable = $("table#table_lookup").dataTable({
    "bLengthChange": false,
    "bFilter": false,
    "sPaginationType": "full_numbers",
    "aaData": data,
    "aoColumnDefs": [{ 
            "sTitle": "No.", 
            "mData": null,
            "sDefaultContent": "", //add this
            "aTargets": [0], 
            "bSortable": false,
            "fnCreatedCell": function (nTd, sData, oData, iRow, iCol) {
                $(nTd).text((iRow + 1));
            }],
    "bAutoWidth": false,
    "aaSorting": [[ 1, 'asc' ]]
});