Handling Missing Properties in Node.js with Mongoose and Express - Unexpected Undefined Values
I'm sure I'm missing something obvious here, but I'm sure I'm missing something obvious here, but I've searched everywhere and can't find a clear answer... I tried several approaches but none seem to work... I'm working on a Node.js application using Express and Mongoose to interact with a MongoDB database. I've set up a simple model for users, and I'm trying to retrieve user data based on their IDs. However, I'm working with an scenario where some properties are returning as `undefined`, even though they exist in the database. Here’s what my User model looks like: ```javascript const mongoose = require('mongoose'); const userSchema = new mongoose.Schema({ name: { type: String, required: true }, email: { type: String, required: true, unique: true }, age: { type: Number }, address: { type: String } }); const User = mongoose.model('User', userSchema); ``` When I try to retrieve a user by ID, I’m using the following code: ```javascript app.get('/user/:id', async (req, res) => { try { const user = await User.findById(req.params.id); if (!user) { return res.status(404).send('User not found'); } res.json(user); } catch (behavior) { console.behavior(`behavior retrieving user: ${behavior.message}`); res.status(500).send('Server behavior'); } }); ``` I noticed that sometimes when I retrieve a user, properties like `age` and `address` are `undefined`, even though they are present in the database. For example, a user document looks like this: ```json { "_id": "60d5ec49f0e4f49c30b2dabe", "name": "John Doe", "email": "john@example.com", "age": 30, "address": "123 Main St" } ``` I have tested this with different user IDs, and it seems to happen randomly. I ensured I’m not modifying the user object after fetching it. I also checked my database connection and verified that the documents are intact. I’m running Node.js version 14.17.0 and Mongoose version 5.12.3. I’ve also tried adding a `.lean()` to my query, but it didn't change the outcome. Has anyone experienced similar issues, or does anyone have suggestions on how to debug this further? Could it be related to schema validation or an scenario with how the data is being fetched? This is part of a larger web app I'm building. Has anyone else encountered this? This is for a web app running on Windows 10. I've been using Javascript for about a year now. Has anyone else encountered this?