英文:
Search an array of objects to match objectId from mongodb
问题
以下是您要翻译的内容：
"我正在尝试通过包含嵌套对象ID的键来搜索对象数组以进行填充。
我的对象
{
service: 'user',
isModerator: true,
isAdmin: true,
carts: [
{
_id: 5e1344dcd4c94a1554ae0191,
qty: 1,
product: 5e09e4e0fcda6f268cefef3f,
user: 5e0dda6d6853702038da60f0,
expireAt: 2020-01-06T14:31:56.708Z,
__v: 0
},
{
_id: 5e13455306a54b31fc71b371,
qty: 1,
product: 5e09e507fcda6f268cefef40,// object ID
user: 5e0dda6d6853702038da60f0,
expireAt: 2020-01-06T14:33:55.573Z,
__v: 0
},
],
我想要匹配 carts 数组，以确定用户是否正在添加包含在其中的产品，以便不重复添加，而是增加现有产品的数量。
我的代码
const itemId = req.body._id;
const userId = req.user._id;
const { qty } = req.body;
try {
const producto = await Product.findById(itemId);
const user = await User.findById(userId).populate({
path: 'carts',
});
const result = user.carts.find((o) => {
console.log(typeof o.product) // 返回对象
console.log(typeof producto._id); // 返回对象
return o.product === producto._id
});
console.log(result); // 返回 undefined
if (result !== undefined) {
const foundCart = await Cart.findById(result._id);
foundCart.qty += qty;
await foundCart.save();
return res.json({ message: 1 });
}
const newCart = new Cart({
qty,
product: producto,
user,
});
const cart = await newCart.save();
user.carts.push(cart);
await user.save();
return res.json({ message: 1 });
} catch (error) {
return console.log(error);
}
英文:
I'm trying to search an array of objects by a key that contains nested object id for populating.
My object
{
service: 'user',
isModerator: true,
isAdmin: true,
carts: [
{
_id: 5e1344dcd4c94a1554ae0191,
qty: 1,
product: 5e09e4e0fcda6f268cefef3f,
user: 5e0dda6d6853702038da60f0,
expireAt: 2020-01-06T14:31:56.708Z,
__v: 0
},
{
_id: 5e13455306a54b31fc71b371,
qty: 1,
product: 5e09e507fcda6f268cefef40,// object ID
user: 5e0dda6d6853702038da60f0,
expireAt: 2020-01-06T14:33:55.573Z,
__v: 0
},
],
I want to match if carts array, contains cart with a product that user is adding, to not add it the second time but instead increment qty of the existing one.
My code
const itemId = req.body._id;
const userId = req.user._id;
const { qty } = req.body;
try {
const producto = await Product.findById(itemId);
const user = await User.findById(userId).populate({
path: 'carts',
});
const result = user.carts.find((o) => {
console.log(typeof o.product) // returns object
console.log(typeof producto._id); // returns object
return o.product === producto._id
});
console.log(result); // returns undefined
if (result !== undefined) {
const foundCart = await Cart.findById(result._id);
foundCart.qty += qty;
await foundCart.save();
return res.json({ message: 1 });
}
const newCart = new Cart({
qty,
product: producto,
user,
});
const cart = await newCart.save();
user.carts.push(cart);
await user.save();
return res.json({ message: 1 });
} catch (error) {
return console.log(error);
}
答案1
得分: 2
I think the problem is this line
return o.product === producto._id
Can you change it like this and try?
return o.product.toString() === producto._id.toString()
英文:
I think the problem is this line
return o.product === producto._id
Can you change it like this and try?
return o.product.toString() === producto._id.toString()
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