Getting row id, not by clicking but from Keyup event

Hi!

Trying to get the row id, when user clicks enter in an input field on that row.
Changing the selectors do not help... Any suggestions on how to achieve this?

Current code just alerts undefined

$('#datatable tbody input').on( 'keyup change', function (ev) {

                    if (ev.keyCode == 13) {
                
                       alert( 'Row index: '+table.row( this ).id() );
                       return false;
                                     
                                   }
                } );

Thankful