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add to cart MERN

Encouraging Eagle answered on November 11, 2022 Popularity 3/10 Helpfulness 1/10

answer add to cart MERN

add to cart MERN

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router.post("/cart", async (req, res) => {
  const { productId, quantity, name, price } = req.body;

  const userId = "5de7ffa74fff640a0491bc4f"; //TODO: the logged in user id

  try {
    let cart = await Cart.findOne({ userId });

    if (cart) {
      //cart exists for user
      let itemIndex = cart.products.findIndex(p => p.productId == productId);

      if (itemIndex > -1) {
        //product exists in the cart, update the quantity
        let productItem = cart.products[itemIndex];
        productItem.quantity = quantity;
        cart.products[itemIndex] = productItem;
      } else {
        //product does not exists in cart, add new item
        cart.products.push({ productId, quantity, name, price });
      }
      cart = await cart.save();
      return res.status(201).send(cart);
    } else {
      //no cart for user, create new cart
      const newCart = await Cart.create({
        userId,
        products: [{ productId, quantity, name, price }]
      });

      return res.status(201).send(newCart);
    }
  } catch (err) {
    console.log(err);
    res.status(500).send("Something went wrong");
  }
});

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: add cart javascript mern

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