Релиз miniShop2 ver. 4.4.1 & 4.4.2

public function getProductGroups($id) {
		if (isset($this->cache['products'][$id])) {
			return $this->cache['products'][$id];
		}
		$groups = array();

		if ($product = $this->modx->getObject('msProduct', $id)) {
			$ids = $this->modx->getParentIds($id, 10, array('context' => $product->get('context_key')));
			$ids[] = $id;
		}
		else {
			$ids = array($id);
		}
		$q = $this->modx->newQuery('msCategoryMember', array('product_id' => $id));
		$q->select('category_id');
		$tstart = microtime(true);
		if ($q->prepare() && $q->stmt->execute()) {
			$this->modx->queryTime += microtime(true) - $tstart;
			$this->modx->executedQueries++;
			if ($tmp = $q->stmt->fetchAll(PDO::FETCH_COLUMN)) {
				$ids = array_merge($ids, $tmp);
			}
		}
		$ids = array_unique($ids);
		$where = count($ids) > 1
			? array('document:IN' => $ids)
			: array('document' => $ids[0]);

		$q = $this->modx->newQuery('modResourceGroupResource', $where);
		$q->leftJoin('msdProductGroup', 'msdProductGroup', 'msdProductGroup.id = modResourceGroupResource.document_group');
		$q->select('document_group, discount');
		$q->sortby('discount');
		$q->groupby('modResourceGroupResource.id');
		$tstart = microtime(true);
		if ($q->prepare() && $q->stmt->execute()) {
			$this->modx->queryTime += microtime(true) - $tstart;
			$this->modx->executedQueries++;
			while ($row = $q->stmt->fetch(PDO::FETCH_ASSOC)) {
				$groups[$row['document_group']] = $row['discount'];
			}
		}
		$this->cache['products'][$id] = $groups;

		return $groups;
	}

if (isset($this->cache['products'][$id])) {
			return $this->cache['products'][$id];
		}

$this->cache['products'][$id] = $groups;