the following is my column definition for a last updated data field coming from the server:

$('#table').DataTable({
"columns": [{ 
  "searchable": true, 
  "data": "last_updated",
  "type": "date", 
  "render": function (data, type, row, meta) { 
      return "<a target=\"_blank\" href=\"/history/" + data.id + "\">" + timeDiff(new 
       Date(data.updated)) + "</a>" 
  }
}]
})

After the table data loads, the sorting occurs on the rendered value, but I want the sorting to occur on data.updated. How can I achieve this?