routeNeedsReload example

#[Route(path: '/checkout/cart', name: 'frontend.checkout.cart.page', options: ['seo' => false], defaults: ['_noStore' => true], methods: ['GET'])]     public function cartPage(Request $request, SalesChannelContext $context): Response
    {
        $page = $this->cartPageLoader->load($request, $context);
        $cart = $page->getCart();
        $cartErrors = $cart->getErrors();

        $this->hook(new CheckoutCartPageLoadedHook($page, $context));

        $this->addCartErrors($cart);

        if (!$request->query->getBoolean(self::REDIRECTED_FROM_SAME_ROUTE) && $this->routeNeedsReload($cartErrors)) {
            $cartErrors->clear();

            // To prevent redirect loops add the identifier that the request already got redirected from the same origin             return $this->redirectToRoute(
                'frontend.checkout.cart.page',
                [...$request->query->all(), ...[self::REDIRECTED_FROM_SAME_ROUTE => true]],
            );
        }
        $cartErrors->clear();

        return $this->renderStorefront('@Storefront/storefront/page/checkout/cart/index.html.twig', ['page' => $page]);
    }