Владислав

<?php
switch ($modx->event->name) {

	case 'OnTVFormPrerender':
		$modx->controller->addHtml("
                <script type='text/javascript'>
                    Ext.ComponentMgr.onAvailable('modx-tv-description', function(){this.maxLength = 500});
                </script>
            ");
        
        break;
}

<?php
switch ($modx->event->name) {

	case 'OnMODXInit':
		$modx->loadClass('modTemplateVar');
		$modx->map['modTemplateVar']['fields']['description'] = 0;
		$modx->map['modTemplateVar']['fieldMeta']['description'] = array(
			'dbtype' => 'mediumtext',
			'precision' => 500,
			'phptype' => 'string',
			'null' => false,
			'default' => '',
		);
		break;
}

<?php
switch ($modx->event->name) {
    case 'OnCommentSave':
        $threadId = $TicketComment->get("thread");
        $thread = $modx->getObject("TicketThread", $threadId);
        $parent = $thread->get("resource");
        //$parent - это id ресурса
        break;
}

$modx->event->output('Товаров на складе больше нет');