Order::updateOrderProducts PHP Method

    private function updateOrderProducts($products)
    {
        if (!$this->productsChanged) {
            return;
        }
        $validOrderProductIds = [];
        foreach ($products as $var) {
            /* @var $var OrderProduct */
            if ($var->getIsNewRecord()) {
                $var->order_id = $this->id;
            }
            if ($var->save()) {
                $validOrderProductIds[] = $var->id;
            }
        }
        $criteria = new CDbCriteria();
        $criteria->addCondition('order_id = :order_id');
        $criteria->params = [':order_id' => $this->id];
        $criteria->addNotInCondition('id', $validOrderProductIds);
        OrderProduct::model()->deleteAll($criteria);
    }