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 IDuser: 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 undefinedif (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 IDuser: 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 objectconsole.log(typeof producto._id); // returns objectreturn o.product === producto._id});console.log(result); // returns undefinedif (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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