Dynamic data in a child row using one-to-many

Hi all,

So I just got my child row to work and it's fantastic! I even added the slider effect. I'm loving it.

So my challenge now is... I was trying out the one-to-many feature as explained here: https://editor.datatables.net/examples/advanced/joinArray.html I got that working, but I'd like to have each "access" or in my case "contact" to appear in the child row, but I can't figure out how.

I just need to know how to place { data: "contacts", render: "[, ].cname" } into the javascript for '<td>'+d.table.column+'</td>'+

I have the following:

server-side

<?php

// DataTables PHP library
include("../Editor-PHP-1.4.2/php/DataTables.php");


use
    DataTables\Editor,
    DataTables\Editor\Field,
    DataTables\Editor\Format,
    DataTables\Editor\Join,
    DataTables\Editor\Upload,
    DataTables\Editor\Validate;

Editor::inst( $db, 'brand' )
    ->field(
        Field::inst( 'brand.name' ),
        Field::inst( 'brand.address' ),
        Field::inst( 'brand.city' ),
        Field::inst( 'brand.state' ),
        Field::inst( 'brand.country' )
    )

    ->join(
        Join::inst( 'contacts', 'array' )
            ->join(
                array( 'id', 'brand_id' ),
                array( 'id', 'contact_id' ),
                'brand_to_contacts'
            )
            ->fields(
                Field::inst( 'id' )->validator( 'Validate::required' )
                ->options( 'contacts', 'id', 'cname'),
                Field::inst( 'cname' )
            )
    )
    ->process($_POST)
    ->json();

javascript for the child function

    function format ( d ) {
        // `d` is the original data object for the row
        return '<div class="slider">'+ '<table cellpadding="5" cellspacing="0" border="0" style="padding-left:50px;">'+
            '<tr>'+
            '<td>Contact Name:</td>'+
            '<td>'+d.???.????+'</td>'+
            '</tr>'+
            '</table>'+
        '</div>';
    }