How to update a nested model in mongoose and mongodb - mongodb

Question

I'm building a MEAN stack web application.
I have a model in mongoose like this. A model name analyses, where inside , there is a property call points which is another small model name analysis
//model file
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var analysis = new Schema({
ref_id: String,
ele_name: String,
pos_x: Number,
pos_y: Number,
pos_pix_x: Number,
pos_pix_y: Number,
});
var analyses = new Schema({
img_id: String,
store_file_name:String,
points: {
type: [analysis],
default: undefined
},
});
module.exports = mongoose.model('analyses', analyses);
In the database , after I create an entry. there something like this
As you can see, there an id of analyses (5bb...820e) inside have an array of points ( analysis), each has their own id ( 5bb...26d)
Now if I want to update this. I use ExpressJS to define the update API of the server
// API define file
var express = require('express');
var analysesRoutes = express.Router();
// Require Item model in our routes module
var Analyses = require('../models/analyses');
// Defined update route
analysesRoutes.route('/update/:id').put(function (req, res) {
Analyses.findById(req.params.id, function(err, analyses) {
if (!analyses)
return next(new Error('Could not load Document'));
else {
for ( item of Object.keys(req.body)){
analyses[item] = req.body[item];
}
analyses.save().then(analyses => {
res.json({...analyses, status: 200});
})
.catch(err => {
res.status(400).send("unable to update the database");
});
}
});
});
But my problem here is if I want to update only 1 analysis point, I have to send the request to update the big analyses object ( call out id 5bb...820e). Something like this :
//service file
updateAnalyses(newObj, id) {
const uri = 'http://localhost:4000/analyses/update/' + id;
this
.http
.put(uri, newObj)
.subscribe(res => console.log('Done'));
}
// Where newObj here is a big analyses object contains all the unnecessary detail + the point need to be updated
In fact, that point also have an id ( 5bb..26d) itself, is there anyway to update directly to that analysis point ??

Answer 1

Similar question was answered before in Stack overflow.
You can refer to it from here: MongoDB update data in nested field
P.S. There are many answers related to mongodb. Personally the parent.$.child notation worked for me.