Set the initial selected option for rendered selec

问题:

I have a problem to append a selected value option in a DataTable.

Here is my JavaScript code

  var table = $('#tablesurvey').DataTable( {
    "ajax": {
        "url": '<?php echo site_url('data'); ?>',
        "type": "POST"
    },

    "columns": [
        {"data": "id_vote"},
        {"data": "nama"},
        {"data": "nik"},
        {"data": "desa"},
        {"data": "rt"},
        {"data": "vote"}
    ],
        "columnDefs": [ {
            "targets": -1,
            "render": function (data, type, row, meta){
             return "<select class='pilihan form-control' id='pilihan'><option value='0'>--Pilihan--</option><option value='1'>1</option><option value='2'>2</option><option value='3'>3</option</select>";
         }
        } ],
    } );

Result before

Result what I want

How do I set the initial selected option for the rendered select box?

回答1:

You could build the <select> programmatically, i.e step by step adding <option>'s and compare with data.vote. Or you could use a more generic jQuery based solution for convenience :

render: function (data, type, row, meta){
  var $select = $("<select class='pilihan form-control' id='pilihan'><option value='0'>--Pilihan--</option><option value='1'>1</option><option value='2'>2</option><option value='3'>3</option></select>");
  $select.find('option[value="'+data.vote+'"]').attr('selected', 'selected');
  return $select[0].outerHTML
}