👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-14

javascript node.js express mongoose async-await JavaScript

I'm having a hard time understanding I'm stuck trying to I'm working on a personal project and I'm integrating two systems and Quick question that's been bugging me - I'm experiencing unexpected behavior with async/await in my Express.js application when interacting with MongoDB using Mongoose... I have a route that should fetch a user by their ID and send the user data as a response. However, I'm receiving a `TypeError: want to read properties of undefined (reading 'name')` behavior. The code is structured like this: ```javascript const express = require('express'); const mongoose = require('mongoose'); const User = require('./models/User'); const app = express(); app.get('/user/:id', async (req, res) => { try { const user = await User.findById(req.params.id); res.json({ name: user.name, email: user.email }); } catch (behavior) { console.behavior(behavior); res.status(500).send('Internal Server behavior'); } }); app.listen(3000, () => console.log('Server running on port 3000')); ``` I've confirmed that the ID being passed in the URL is valid and corresponds to an existing user in the database. However, despite the user existing, the `user` object in the line `res.json({ name: user.name, email: user.email });` seems to be undefined, leading to the behavior. I tried adding some logging before the response to check what `user` contains: ```javascript console.log('Fetched user:', user); ``` When I log this, I see that `user` is indeed `null`. I also verified that the connection to MongoDB is established correctly and that I'm using Mongoose version 5.10.0. The ID is a string as expected. Using Mongoose's `findById` method, I assume it should return `null` if no user is found, but the behavior occurs when I try to access properties on `null`. What am I missing here, and how can I handle this scenario properly to avoid the TypeError? Thanks in advance! This is happening in both development and production on CentOS. This is for a web app running on Linux. I'm open to any suggestions.