Роман

{set $resource = $_modx->getResources(
    ['published' => 1, 'deleted' => 0],
    ['sortby' => 'id', 'sortdir' => 'ASC', 'limit' => 1, 'parents' => 54]
)}
{if $resource}
  {$_modx->sendRedirect( $_modx->makeUrl($resource.0.id) )}
{/if}

{set $resource = $_modx->getResources(
    ['published' => 1, 'deleted' => 0],
    ['sortby' => 'id', 'sortdir' => 'ASC', 'limit' => 1, 'parent' => 54]
)}
 {foreach $resource as $child}
                        <div>
                            {$child.id}
                        </div>
{/foreach}