How to get model data from nested object - node.js

Question

little bit stuck with mongoose. I want to get all users projects where he's added. Tried few options, but in all of them I receive an empty array. So the main question is it possible somehow to find all project by filtering/finding the Project model?
This is how looks my default response to understand what I'm looking for:
{
"_id": "61a8bc4e8e24f10ac7a7288d",
"name": "Random project",
"description": "Random project desc",
"maxWorkingEmployees": 5,
"status": "Paused",
"createdBy": {
"_id": "61a66578f2dabf7555bcf4ab",
"email": "Henrikas#furniture1.eu",
"role": "Owner"
},
"currentlyWorkingEmployees": [
{
"username": "Ema",
"role": "Employee",
"_id": "61a8e0423140ecce769dc971"
}
],
"createdAt": "2021-12-02T12:30:06.461Z",
"updatedAt": "2021-12-02T15:11:51.361Z",
"__v": 0
}
Project model:
const mongoose = require('mongoose');
const SingleUserSchema = new mongoose.Schema({
username: {
type: String,
required: true,
},
role: {
type: String,
required: true,
},
});
const ProjectSchema = new mongoose.Schema(
{
name: {
type: String,
required: [true, 'Provide project name'],
minlength: 5,
},
description: {
type: String,
required: [true, 'Provide description about the project'],
},
maxWorkingEmployees: {
type: Number,
required: [
true,
'Provide maximum number of employees working on this project',
],
},
currentlyWorkingEmployees: [SingleUserSchema],
status: {
type: String,
enum: ['Pending', 'In progress', 'Paused', 'Delayed', 'Completed'],
default: 'Pending',
},
createdBy: {
type: mongoose.Schema.ObjectId,
ref: 'User',
required: true,
},
},
{ timestamps: true }
);
module.exports = mongoose.model('Project', ProjectSchema);
Here's my controller and my first try:
const getMyProjects = async (req, res) => {
const userId = req.user.userId;
const projects = await Project.find({
currentlyWorkingEmployees: { _id: userId },
});
res.json({projects});
};
Second shot after reading some articles
const getMyProjects = async (req, res) => {
const userId = req.user.userId;
const projects = await Project.aggregate([
{
$match: {
currentlyWorkingEmployees: { _id: userId },
},
},
]);
};

Answer 1

As I said in the comment you can do it accessing to the internal object of the schema with an string accessing to it child object.
Project.find({'currentlyWorkingEmployees._id': userId})