Cannot read properties of undefined (reading '_id')

Hi Mosh,

Got an error while getting the current user using GET method in postman. Here’s the error

const user = await User.findById(req.user._id).select(‘-password’);
TypeError: Cannot read properties of undefined (reading ‘_id’)

const mongoose = require(‘mongoose’);
const express = require(‘express’);
const router = express.Router();
const _ = require(‘lodash’);
const bcrypt = require(‘bcrypt’);
const auth = require(‘…/middleware/auth’);
const { User, validate } = require(‘…/models/user’);

router.get(‘/me’, auth, async (req, res) => {
const user = await User.findById(req.user._id).select(‘-password’);

I’m able to fixed the problem using res.user._id instead of req.user._id. Im still confused because the middleware authorization return a res.user as shown

const jwt = require(‘jsonwebtoken’);
const config = require(‘config’);

module.exports = function (req, res, next) {
const token = req.header(‘x-auth-token’);
if (!token) return res.status(401).send(‘Access denied. No token provided.’);

try {
const decoded = jwt.verify(token, config.get(‘jwtPrivateKey’));
res.user = decoded;
} catch (ex) {
res.status(400).send(‘Invalid token.’);

Hey its Harvel,
Actually you set the user object on the response object instead of the request object,
So req.user is undefined

Set the user object on the request object in the auth middleware

Hi Harvel,

my fault actually when I review that section yesterday. my bad. Thanks anyway.

Hi, I’m with the exact same problem, I verified and I have the code exactly as you have it there but it stills shows me the error