TypeError: Cannot read properties of undefined (reading '_id') (nodejs)

Question

I was trying to get the user data from my database, but what I get is req.body is undefined, I can't fix the problem and I need help.

Error : TypeError: Cannot read properties of undefined (reading '_id')

my code:

user.js

const express = require("express");
const router = express.Router();
const { requireSignin, authMiddleware } = require("../controllers/auth");
const { read } = require("../controllers/user");

router.get("/profile", requireSignin, authMiddleware, read);

module.exports = router;

Auth.js

exports.authMiddleware = (req, res, next) => {
  const authUserId = req.user._id;
  console.log(authUserId);
  User.findById({ _id: authUserId }).exec((err, user) => {
    if (err || !user) {
      return res.status(400).json({
        error: "User not found",
      });
    }
    req.profile = user;
    next();
  });
};

exports.requireSignin = expressjwt({
  secret: process.env.JWT_SECRET,
  algorithms: ["HS256"],
});

At least show us where req.user is supposed to be coming from. — robertklep
– robertklep, Commented Jun 28, 2022 at 12:51
@IshtiaqMahmood, you add body parser ? Can you show the code where you integrated the middlewares — Ghanshyam Baviskar
– Ghanshyam Baviskar, Commented Jun 28, 2022 at 13:50
"The decoded JWT payload is now available as req.auth rather than req.user" — robertklep
– robertklep, Commented Jun 28, 2022 at 13:59

robertklep · Accepted Answer · 2022-06-28 14:20:20Z

1

With v6 of express-jwt, req.user was replaced by req.auth, as documented in the migration notes:

The decoded JWT payload is now available as req.auth rather than req.user

answered Jun 28, 2022 at 14:20

robertklep

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Comments

Andres23Ramirez · Accepted Answer · 2022-09-23 04:16:08Z

0

You can put an Optional Chaining operator ? In order to avoid “read properties of undefined error”.

const authUserId = req.user._id;

answered Sep 23, 2022 at 4:16

Andres23Ramirez

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