How are sorting server side?

Siggi

hey

how can i sort columns by timestamp?

i use in my code the return display and timestamp

            ->editColumn('start', function ($data) {
                if ($data->start->timestamp < $data->end->timestamp && $data->start->format('Y') == $data->end->format('Y')) {
                    $dateFormat = $data->start->format('d.m') . ' - ' . $data->end->format('d.m.Y');
                } elseif ($data->start->timestamp < $data->end->timestamp) {
                    $dateFormat = $data->start->format('d.m.Y') . ' - ' . $data->end->format('d.m.Y');
                } else {
                    $dateFormat = $data->start->format('d.m.Y');
                }
                return [
                    'display' => e($dateFormat),
                    'timestamp' => $data->end->timestamp
                ];
            })

my javascript code is

        $('#dataTableEvents').dataTable({
            processing: true,
            serverSide: true,
            ajax: '/events/all-events',
            columns: [
                {data: 'action'},
                {data: 'name'},
                {data: 'start.display', sort: 'start.timestamp'},
                {data: 'end'},
            ],
            order: [[2, 'desc'], [3, 'desc']],
            columnDefs: [
                {
                    targets: 0,
                    orderable: false,
                    searchable: false,
                    width: "58px"
                }
            ]
        });

the result is

31.12.2018 - 01.01.2019
31.10 - 31.10.2018
31.10 - 31.10.2016
31.10 - 31.10.2016
31.08 - 31.08.2018
31.08 - 31.08.2017
31.05 - 31.05.2019
30.08.2019

i can the html 5 data-order with timestamp in the td but with server side not working

thx for help

Siggi

Okay it works when i delete

processing: true,
serverSide: true,

$('#dataTableEvents').dataTable({
    ajax: '/events/all-events',
    columns: [
        {data: 'action'},
        {data: 'name'},
        {
            data: {
                _: 'start.display',
                sort: 'start.timestamp'
            }
        },
        {data: 'end'},
    ],
    order: [[2, 'desc'], [3, 'desc']],
    columnDefs: [
        {
            targets: 0,
            orderable: false,
            searchable: false,
            width: "58px"
        }
    ]
});

allan

What is ->editColumn('start', function ($data) {? I don't think that's part of a script we publish?

Allan