dataTable添加序号列

columns: [
            {data: "id", title: "id", visible: false, searchable: false},
            {data: null, tile: "序号", visible: true, searchable: false},
            {data: "name", title: "名称", visible: true, searchable: false},
            {data: "createTime", title: "创建时间", visible: true, searchable: false},
            {data: null, title: "操作", visible: true, searchable: false} //序号为-1
        ],

columnDefs: [
            {
                targets: 1,
                render: function (data, type, row, meta) {
                    return meta.row+1
                }
            }
        ],