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使用 nodejs 和 mongoDB， 如何在产品数组中添加产品对象？

****我正在尝试嵌套..下面提到的代码**** 类别架构

const mongoose = require("mongoose")

const category = new mongoose.Schema({
    name: { type: String, required: true, unique: true },
    slug: { type: String, required: true },
    sub: []
}, {
    collection: "Categories", timestamps: true
})

const model = mongoose.model("category", category);

module.exports = model

使用这个模式（上面提到过）我将子类别添加到 sub[]

添加类别 添加子类别

router.post('/addcategory', async (req, res)=>{
   
    const category = new Category({
        name: req.body.cat_name.trim(),
        slug: req.body.cat_slug.trim()
    })
    category.save()
    .then(()=>{

router.post('/addsubcategory', async (req, res) => {
    let name= req.body.subcat_name.trim();
    let slug= req.body.subcat_slug.trim();
    let category = req.body.selectcategory.trim();
    Category.updateOne({"name": category},
        {
            $push: {
                sub: {$each: [{name: name, slug: slug, products: []}]}
            }
        })
        .then(()=>{

直到这里它工作正常

问题从这里开始

router.post('/addproduct', async (req, res) => {
    let name= req.body.prod_name.trim();
    let price= req.body.prod_price.trim();
    let category = req.body.selectcategory.trim();
    let subcategory = req.body.selectsubcategory.trim();
    let desc = req.body.prod_desc.trim();
    console.log(`Collection: ${name+""+price+""+category+""+subcategory+""+desc}`)
    Category.updateOne({"name": "category", "sub.name": "subcategory"},
        {
            
                $push: {
                    "sub.$[].products": {$each: [{name, price, desc}]}
                    //  products: {$each: [{name, price, desc}]} This didnt work too.
                }
       
            
        })
        .then(()=>{
[Unable to add product in product array][4]

我无法在 products[] 中添加产品集合名称：类别

如何在产品数组中添加产品对象？ 这是我的数据库在插入时的样子

{"_id":{"$oid":"61fa651c844869aae2cacdcd"},
"name":"Clothes","slug":"clothes","sub":[
    {"name":"Sports","slug":"sports","products":[]},
    {"name":"Party wear","slug":"partywear","products":[]}
],
"createdAt":{"$date":{"$numberLong":"1643799836133"}},
"updatedAt":{"$date":{"$numberLong":"1643800511218"}},
"__v":{"$numberInt":"0"}}
4

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