Add row to migx grid via formit

[[!FormIt? 
 &hooks=`email,updatePlaces,createOrder,redirect` 
 &emailTpl=`bookingFormReport` 
 &emailTo=`[email protected]` 
 &redirectTo=`9`
]]

<input type="hidden" name="pageID" value="[[+fi.pageID]]"/>

<?php
$docID = $hook->getValue('pageID');
$page = $modx->getObject('modResource', $docID);

$value = $page->getTVValue('attendees');
$items = $modx->fromJSON($value);
 
$next_id = 1;
//get the next MIGX_id
if (is_array($items)){
    foreach ($items as $item){
        $id = $modx->getOption('MIGX_id',$item,0)+1;
        if ($id > $next_id){
            $next_id = $id;
        }   
    }
}else{
    $items = array();
}
  
$item = array(
    'MIGX_id'       => $next_id,
    'name'          => $hook->getValue('name'),
);
$items[] = $item;
  
if (!$page ->setTVValue('attendees', $modx->toJson($items))) {
  $modx->log(modX::LOG_LEVEL_ERROR,'There was a problem saving your data!');
  return false;
}

<input type="hidden" name="pageID" value="15"/>

if (!$page ->setTVValue('orderList', $modx->toJson($items))) {
  $modx->log(modX::LOG_LEVEL_ERROR,'There was a problem saving your data!');
  return false;
}else {
    return true;
}
}