Question

我试图将产品添加到我的CartController中当前登录的用户购物车中，但是当我点击“添加到购物车”按钮时，它会抛出以下异常：警告：

为foreach（）提供的参数无效

这是我的addToCart功能：

/**
     * @Route("/cart/add", name="cart_add")
     */
    public function addToCartAction(Request $request)
    {
        $manager = $this->getDoctrine()->getManager();
        $currentUserId = $this->get('security.token_storage')->getToken()->getUser();
        $session = $this->get('session');
        $id_cart = $session->get('id_cart', false);

        if (!$id_cart) {
            $cart = new Cart();
            $cart->setUserId($currentUserId);
            $cart->setDateCreated(new \DateTime());
            $cart->setDateUpdated(new \DateTime());

            $manager->persist($cart);
            $manager->flush();
            $session->set('id_cart', $cart->getId());
        }

        $cart = $this->getDoctrine()->getRepository('AppBundle:Cart')->find($session->get('id_cart', false));

        $products = $request->get('products');

        foreach ($products as $id_product) {
            $product = $this->getDoctrine()->getRepository('AppBundle:Product')->find($id_product);

            if($product) {
                $cartProduct = new CartProduct();
                $cartProduct->setCart($cart);
                $cartProduct->setProduct($product);
                $cartProduct->setQuantity(1);

                $manager->persist($cartProduct);
            }
        }
        $cart->setDateUpdated(new \DateTime());
        $manager->persist($cart);
        $manager->flush();

        return $this->redirectToRoute('cart_list');
    }

Answer 1

获取参数时应添加默认值以避免出现这类错误：

namespace App\Http\Controllers\Panel;

use Illuminate\Http\Request;
use Illuminate\Routing\Controller;

class AuthController extends Controller
{
    public function Login(Request $request)
    {
        header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");

        return view('admin.login');
    }

    public function Auth(Request $request)
    {
        header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");
        dump($request->all());
        echo "Received";
    }
}

在Symfony Controller中为foreach提供的参数无效

1 个答案: