minishop2 - размер продукта

<?php
if (empty($limit)) {$limit = 10;}

$q = $modx->newQuery('msOrderProduct');
$q->limit($limit);
if (!empty($exclude)) {
$q->where(array('product_id:NOT IN' => array_map('trim', explode(',', $exclude))));
}
$q->select('product_id, COUNT(product_id) as count');
$q->groupby('product_id');
$q->sortby('count','DESC');

if ($q->prepare() && $q->stmt->execute()) {
$products = $q->stmt->fetchAll(PDO::FETCH_COLUMN);
return implode(',', $products);
}