mongoose expressJS update single field in nested array - node.js

Question

I am trying to build edit function in my web app using Mongoose and expressJS as backend, I want to update a single field in lessonLog which is an array of lessonLog with individual objectId, I tried it with the following code but not working as I intended, please advise. thank you in advance!
{
Object _id : 601e7877cc4bc5047860831b ObjectId,
date : 2021-02-05T16:00:00.000+00:00 Date,
tempoMin : 71,
tempoMax : 206,
title : Khulau,
intonation : test,
phrasing : test,
articulation : technique : test,
notes : test ,
}
const studentsSchema = new mongoose.Schema({
name: { type: String, require: true },
email: { type: String, require: true },
contact: { type: String, require: true },
activities: {
exam: { type: String, require: true },
recording: { type: String, require: true },
theory: { type: String, require: true },
competition: { type: String, require: true },
orchestra: { type: String, require: true },
},
teacher: { type: mongoose.Types.ObjectId, require: true, ref: "teachers" },
repertoire: [{ type: String, require: true }],
**lessonLog: [
{
date: { type: Date, require: true },
tempoMin: { type: String, require: true },
tempoMax: { type: String, require: true },
title: { type: String, require: true },
scales: { type: String, require: true },
intonation: { type: String, require: true },
phrasing: { type: String, require: true },
articulation: { type: String, require: true },
technique: { type: String, require: true },
notes: { type: String, require: true },
},**
],
});
here is the query:
const editLessonLog = async (req, res, next) => {
try {
await Students.findOneAndUpdate(
{
lessonLog: { _id: req.body.lessonLogId },
},
{
$set: {
lessonLog: {
date: req.body.lessonDate,
tempoMin: req.body.tempo[0],
tempoMax: req.body.tempo[1],
title: req.body.title,
intonation: req.body.intonation,
phrasing: req.body.phrasing,
articulation: req.body.articulation,
technique: req.body.technique,
notes: req.body.notes,
},
},
}
);
// console.log(student);
} catch (err) {
const error = new HttpError(
"Cannot delete lesson log, please try again.",
500
);
return next(error);
}

Answer 1

you should using $ based on documentation
The positional $ operator identifies an element in an array to update without explicitly specifying the position of the element in the array
so just try
const editLessonLog = async (req, res, next) => {
try {
await Students.findOneAndUpdate(
{
"lessonLog._id": req.body.lessonLogId
},
{
$set: {
"lessonLog.$": {
date: req.body.lessonDate,
tempoMin: req.body.tempo[0],
tempoMax: req.body.tempo[1],
title: req.body.title,
intonation: req.body.intonation,
phrasing: req.body.phrasing,
articulation: req.body.articulation,
technique: req.body.technique,
notes: req.body.notes,
},
},
}
);
// console.log(student);
} catch (err) {
const error = new HttpError(
"Cannot delete lesson log, please try again.",
500
);
return next(error);
}