Sonata\BasketBundle\Controller\Api\BasketController::handleWriteBasketElement PHP Метод

    protected function handleWriteBasketElement($basketId, $request, $elementId = null)
    {
        $basket = $this->getBasket($basketId);
        $this->basketBuilder->build($basket);
        $productId = $request->request->get('productId');
        $product = $this->getProduct($productId);
        $productPool = $basket->getProductPool();
        $code = $productPool->getProductCode($product);
        $productDefinition = $productPool->getProduct($code);
        $basketElement = $elementId ? $this->getBasketElement($elementId) : $this->basketElementManager->create();
        $basketElement->setProductDefinition($productDefinition);
        $form = $this->formFactory->createNamed(null, 'sonata_basket_api_form_basket_element', $basketElement, array('csrf_protection' => false));
        $form->bind($request);
        if ($form->isValid()) {
            $basketElement = $form->getData();
            if ($elementId) {
                $this->basketElementManager->save($basketElement);
            } else {
                $basket->addBasketElement($basketElement);
                $this->basketManager->save($basket);
            }
            $view = \FOS\RestBundle\View\View::create($basket);
            $serializationContext = SerializationContext::create();
            $serializationContext->setGroups(array('sonata_api_read'));
            $serializationContext->enableMaxDepthChecks();
            $view->setSerializationContext($serializationContext);
            return $view;
        }
        return $form;
    }