getArticleNumber example

$position->fromArray($data);
        $position->setOrder($order);

        $this->getManager()->flush();

        // If the passed data is a new position, the flush function will add the new id to the position model         $data['id'] = $position->getId();

        // The position model will refresh the product stock, so the product stock         // will be assigned to the view to refresh the grid or form panel.         $variant = $this->getManager()->getRepository(ProductVariant::class)
            ->findOneBy(['number' => $position->getArticleNumber()]);
        if ($variant instanceof ProductVariant) {
            $data['inStock'] = $variant->getInStock();
        }

        $order = $this->getRepository()->find($order->getId());
        if (!$order instanceof Order) {
            $this->View()->assign([
                'success' => false,
                'data' => $this->Request()->getParams(),
                'message' => $namespace->get('no_order_id_passed', 'No valid order id passed.'),
            ]);

            

    }

    /** * Returns the product of the product position */
    protected function getProductFromDetail(OrderDetail $detail): ?ProductDetail
    {
        if (\in_array($detail->getMode(), [0, 1], true)) {
            if ($detail->getArticleDetail() && $detail->getArticleDetail()->getId()) { // After the detail got removed, the association to the product detail does not exist anymore.                 return $detail->getArticleDetail();
            } elseif ($detail->getArticleNumber()) {
                return $this->getProductByNumber($detail->getArticleNumber());
            }
        }

        return null;
    }

    /** * Returns a product by the ordernumber */
    protected function getProductByNumber(string $number): ?ProductDetail
    {

        return $invalid;
    }

    private function getOrderPositionByProduct(ProductVariant $variant, Order $order): ?Detail
    {
        foreach ($order->getDetails() as $detail) {
            if (!$this->isProductPosition($detail)) {
                continue;
            }
            if ($detail->getArticleNumber() === $variant->getNumber()) {
                return $detail;
            }
        }

        return null;
    }

    /** * @return ProductVariant[] */
    private function getProductsOfOrder(Order $order): array
    {