how to update embed document in mongoDB with mongoose - node.js

Question

i have course model like
const courseSchema = new mongoose.Schema({
name:{
type: String,
required:[true,'course must have a name.'],
unique:true
},
duration :Number,
description :String,
imageCover :String,
images:Array,
price :Number,
curriculum:
[
{
week:Number,
description:String,
total:Number,
completed:Number,
progress:Number,
links:
[
{
name:String,
link:String,
img:String,
watched:{
type:Boolean,
default:false
}
}
]
}
],
tutors:[
{
type: mongoose.Schema.ObjectId,
ref:'user'
}
]
},
{
toJSON:{virtuals : true},
toObject:{virtuals : true}
});
i want to add new objects to links array in curriculum .client side will patch request with week object id , name and link ,inside update handler i am doing somthing like this.
const cour = await Course.findOneAndUpdate({"caricullum._id":req.params.w},
{$push:{name:req.body.name,link:req.body.link}},{
new : true,
});
w params contain curriculum week _id
{
"_id": {
"$oid": "6138abc106b3ad1d3477b3e2"
},
"images": [],
"tutors": [],
"name": "c/c++",
"duration": 8,
"price": 1299,
"imageCover": "cool_lion.jpg",
"description": "",
"curriculum": [
{
"_id": {
"$oid": "6138abc106b3ad1d3477b3e3"
},
"week": 1,
"description": "introduction to microcontroller and microprocesor",
"links": [
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3e4"
},
"name": "introduction",
"link": "https://www.youtube.com/embed/d0e6ScoS3Sw"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3e5"
},
"name": "difference between mc and mp",
"link": "https://www.youtube.com/embed/dcNk0urQsQM"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3e6"
},
"name": "building with microcontroller vs boards(arduino uno)",
"link": "https://www.youtube.com/embed/IdEcm3GU7TM"
}
]
},
{
"_id": {
"$oid": "6138abc106b3ad1d3477b3e7"
},
"week": 2,
"description": "introduction to arduino uno",
"links": [
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3e8"
},
"name": "introduction to arduino uno",
"link": "https://www.youtube.com/embed/BiCSW6QR6HA"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3e9"
},
"name": "IO PINS",
"link": "https://www.youtube.com/embed/OZGMLOwHYf8"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3ea"
},
"name": "setting up arduno uno for programming",
"link": "https://www.youtube.com/embed/ELUF8m24sZo"
}
]
},
{
"_id": {
"$oid": "6138abc106b3ad1d3477b3eb"
},
"week": 3,
"description": "interfacing with different sensors",
"links": [
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3ec"
},
"name": "LED Blinking(OUTPUT)",
"link": "https://www.youtube.com/embed/dnPPoetX0uw"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3ed"
},
"name": "interfacing with button(INPUT)",
"link": "https://www.youtube.com/embed/58Ynhqmvzoc"
},
{
"watched": false,
"_id": {
"$oid": "6138abc106b3ad1d3477b3ee"
},
"name": "16x2 LCD",
"link": "https://www.youtube.com/embed/Mr9FQKcrGpA"
}
]
}
],
"__v": 0
}
how to query for correct week document with req.params.w and push new document into links array

Answer 1

use arrayFilters
db.collection.update({},
{
$push: {
"curriculum.$[elem].links": {
link: "a",
name: "b",
whatched: "c"
}
}
},
{ new:true,
arrayFilters: [
{
"elem.week": 1
}
]
})
https://mongoplayground.net/p/nLV9UzbJlsc