mongodb insert into array of objects - node.js

Question

I need to find the element by id, then go into the array of objects, find the desired by id and add the field guessId into it and insert the id key into it and assign the array of id. How can I do that ?
https://jsoneditoronline.org/?id=442f1dae0b2d4997ac69d44614e55aa6
In general, I need to create a GuessId field with such a structure
in fact, I am doing the voting, that is, the key in guessId will be go to vote, and the array to it, this is users who vote
{
"_id": "f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"bio": {
"firstname": "Лена",
"lastname": "фыв",
"middlename": "",
"company": "вв"
},
"files": [
{
"_id": "2e4e40c7-4df6-4974-8d16-bb24cd8134d6",
"destination": "./uploads/f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"filename": "2e4e40c7-4df6-4974-8d16-bb24cd8134d6.mp3",
"path": "uploads\\f58482b1-ae3a-4d8a-b53b-ede80fe1e225\\2e4e40c7-4df6-4974-8d16-bb24cd8134d6.mp3",
"folder": "f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"info": {
"size": 20805727,
"mimetype": "audio/mp3",
"encoding": "7bit",
"originalname": "Ахуевший Ленусик (Банк русский стандарт). Выпуск #5..mp3",
"fieldname": "selectedFile"
},
"userId": "5e05da745b21e61ccc84a892",
"date": "2019-12-27T10:19:12.213Z"
},
{
"_id": "81b94dea-ece6-421c-b68a-0aa59332cd0d",
"destination": "./uploads/f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"filename": "81b94dea-ece6-421c-b68a-0aa59332cd0d.mp3",
"path": "uploads\\f58482b1-ae3a-4d8a-b53b-ede80fe1e225\\81b94dea-ece6-421c-b68a-0aa59332cd0d.mp3",
"folder": "f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"info": {
"size": 13515683,
"mimetype": "audio/mp3",
"encoding": "7bit",
"originalname": "Выпуск #75 Попрошайка НСВ..mp3",
"fieldname": "selectedFile"
},
"userId": "5e05da745b21e61ccc84a892",
"date": "2019-12-27T10:25:37.710Z"
}
],
"date": "2019-12-27T10:19:12.213Z",
"__v": 1
}
Schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const HabalkaSchema = new Schema({
_id: {
type: String
},
bio: {
firstname: String,
lastname: String,
middlename: String,
company: String
},
files: [
{
_id: {
type: String
},
destination: {
type: String
},
filename: {
type: String
},
path: {
type: String
},
folder: {
type: String
},
info: {
size: {
type: Number
},
mimetype: {
type: String
},
encoding: {
type: String
},
originalname: {
type: String
},
fieldname: {
type: String
},
},
date: {
type: Date,
default: Date.now
},
bio: {
type: Object
},
userId: String,
guessId: {},
}
],
date: {
type: Date,
default: Date.now
}
});
module.exports = Habalka = mongoose.model('habalka', HabalkaSchema);

Answer 1

You can use the positional $ operator like this:
router.put("/habalka/:id/:fileId/:guessId", async (req, res) => {
const result = await Habalka.findOneAndUpdate(
{
_id: req.params.id,
"files._id": req.params.fileId
},
{
"files.$.guessId": {
[req.params.guessId]: ["a", "b"] //todo: get this array from req.body
}
},
{
new: true
}
);
res.send(result);
});
Route url: http://..../habalka/f58482b1-ae3a-4d8a-b53b-ede80fe1e225/2e4e40c7-4df6-4974-8d16-bb24cd8134d6/asda2
This will give you a result like this in the given file:
"files": [
{
"info": {
"size": 20805727,
"mimetype": "audio/mp3",
"encoding": "7bit",
"originalname": "Ахуевший Ленусик (Банк русский стандарт). Выпуск #5..mp3",
"fieldname": "selectedFile"
},
"date": "2019-12-27T10:19:12.213Z",
"_id": "2e4e40c7-4df6-4974-8d16-bb24cd8134d6",
"destination": "./uploads/f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"filename": "2e4e40c7-4df6-4974-8d16-bb24cd8134d6.mp3",
"path": "uploads\\f58482b1-ae3a-4d8a-b53b-ede80fe1e225\\2e4e40c7-4df6-4974-8d16-bb24cd8134d6.mp3",
"folder": "f58482b1-ae3a-4d8a-b53b-ede80fe1e225",
"userId": "5e05da745b21e61ccc84a892",
"guessId": {
"asda2": [
"a",
"b"
]
}
},
And later if you want to add an item inside one of the guessId arrays, you can use the following code:
router.put("/habalka/:id/:fileId/:guessId", async (req, res) => {
const result = await Habalka.findOneAndUpdate(
{
_id: req.params.id,
"files._id": req.params.fileId
},
{ $push: { [`files.$.guessId.${req.params.guessId}`]: "c" } },
{
new: true
}
);
res.send(result);
});