MongoDB 在更新查詢中不遞增

Question

我正在嘗試增加購物車 object 中訂單項的數量。 每個 Line Item 都有自己的 ObjectId，因為可以添加相同的 item，但處理訂單所需的屬性不同。 這意味着我需要查看正確的行，而不是查看庫存項目。

數據庫記錄

Query ID's
{
  cartId: '6307c7ccb275c35cb6bb2b71',
  lineId: '6307c7d1b275c35cb6bb2b76'
}

Returned Results from Query No Update
{
  _id: new ObjectId("6307c7ccb275c35cb6bb2b71"),
  owner: '611afa8b9069c9126cff3357',
  discount: null,
  total: 101.94,
  items: [
    {
      itemId: '61cb88f25f499fd4563e99d9',
      sku: 1004,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307c7d1b275c35cb6bb2b73")
    },
    {
      itemId: '61cb88d85f499fd4563e99d3',
      sku: 1001,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307c7d1b275c35cb6bb2b76")
    },
    {
      itemId: '61cb89255f499fd4563e99e7',
      sku: 2003,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307c7d3b275c35cb6bb2b79")
    },
    {
      itemId: '61cb88df5f499fd4563e99d5',
      sku: 1002,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307c7d3b275c35cb6bb2b7c")
    },
    {
      itemId: '61cb89255f499fd4563e99e7',
      sku: 2003,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307c7deb275c35cb6bb2b7f")
    },
    {
      itemId: '61cb88d85f499fd4563e99d3',
      sku: 1001,
      quantity: 1,
      price: 16.99,
      _id: new ObjectId("6307cbcc3e81ef0f1a739cf9")
    }
  ],
  createdAt: 2022-08-25T19:04:44.859Z,
  updatedAt: 2022-08-25T19:26:51.714Z,
  __v: 0
}

exports.inc = async (req, res, next) => {
  console.log(req.body);
  const { cartId, lineId } = req.body;
  console.log(cartId);
  console.log(lineId);
  try {
    const updateCart = await Cart.findByIdAndUpdate(
      { _id: cartId, "item._id": lineId },
      { $inc: { quantity: 1 } },
      { new: true, returnDocument: "after" }
    ).exec();

    if (!updateCart) return next(new ErrorResponse("Unable to update the cart record", 404));

    console.log(updateCart);

    if (updateCart) {
      await calculateTotal(updateCart._id, updateCart.items, updateCart.discount);
      return sendRes(updateCart, 200, res);
    } else {
      return sendRes(updateCart, 201, res);
    }
  } catch (error) {
    console.log(error);
    next(error);
  }
};

查詢正在根據UpdateAt值執行和處理更新，但數量沒有更新。

如果您發現任何問題，請參閱讓我知道。

Answer 1

嘗試這個

exports.inc = async (req, res, next) => {
  console.log(req.body);
  const { cartId, lineId } = req.body;
  console.log(cartId);
  console.log(lineId);
  try {
    const updateCart = await Cart.findByIdAndUpdate(
      { _id: cartId, "item._id": new mongoose.Types.ObjectId(lineId) },
      { $inc: { quantity: 1 } },
      { new: true, returnDocument: "after" }
    ).exec();

    if (!updateCart) return next(new ErrorResponse("Unable to update the cart record", 404));

    console.log(updateCart);

    if (updateCart) {
      await calculateTotal(updateCart._id, updateCart.items, updateCart.discount);
      return sendRes(updateCart, 200, res);
    } else {
      return sendRes(updateCart, 201, res);
    }
  } catch (error) {
    console.log(error);
    next(error);
  }
};

Answer 2

以下是對查詢的更正。

    const updateCart = await Cart.findByIdAndUpdate(
      { _id: cartId, "items.&[element]._id": lineId },
      { $inc: { "items.$[element].quantity": 1 } },
      { new: true, returnDocument: "after", arrayFilters: [{ "element._id": lineId }] }
    ).exec();