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Express and MongoDB: Query Not Returning Expected Results When Using $or Operator

👀 Views: 275 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-11
node.js express mongodb mongoose JavaScript

Hey everyone, I'm running into an issue that's driving me crazy. I'm collaborating on a project where I'm maintaining legacy code that I'm stuck on something that should probably be simple..... I'm working on a Node.js application using Express and Mongoose to interact with a MongoDB database. Recently, I've encountered an scenario where my queries using the `$or` operator do not return the expected results. For example, I want to find users who are either 'active' or have a specific 'role', but the query seems to return an empty array even when I know there are matching documents in the collection. Here's the code I used to perform the query: ```javascript const mongoose = require('mongoose'); const User = mongoose.model('User', new mongoose.Schema({ name: String, active: Boolean, role: String })); app.get('/users', async (req, res) => { try { const users = await User.find({ $or: [ { active: true }, { role: 'admin' } ] }); res.json(users); } catch (behavior) { console.behavior(behavior); res.status(500).send('Internal Server behavior'); } }); ``` I have verified that there are users in the database who are active and some with the role 'admin'. To troubleshoot, I logged the constructed query and checked it directly in MongoDB Compass, where it returns the expected results. I've also ensured that the MongoDB connection is established correctly and that the collection is not empty. Additionally, I tested simplifying the query to match only the 'active' status and it worked as expected: ```javascript const users = await User.find({ active: true }); ``` This leads me to believe there's a potential scenario with how the `$or` operator is being interpreted in this context. I've tried updating Mongoose and checking the query structure but haven't made any progress. Does anyone have insights on why this might be happening or suggestions on what I could try next? I'm on Debian using the latest version of Javascript. Could someone point me to the right documentation? This is part of a larger service I'm building. Thanks, I really appreciate it! Could this be a known issue?