MongoDB Atlas: Cannot GET from API - node.js

Question

I developed a simple API that is supposed to GET data from MongoDB Atlas. Unfortunately, if I directly hit the browser or use Postman, I am getting an error:
Cannot GET /api/rooms/getallrooms
server.js
const express = require('express');
const app = express();
const dbConfig = require('./db');
const roomsRoute = require('./routes/roomsRoute');
app.use('api/rooms', roomsRoute);
const port = process.env.PORT || 5001;
app.listen(port, () => {
console.log(`Server started on port ${port} :)`);
});
roomsRoute.js:
const express = require('express');
const router = express.Router();
const Room = require('../models/rooms');
router.get('/getallrooms', async (req, res) => {
try {
const rooms = await Room.find({});
return res.json({rooms});
} catch (error) {
return res.status(400).json({message: error});
}
});
module.exports = router;
rooms.js (Contains room schema):
const mongoose = require('mongoose');
const roomSchema = mongoose.Schema({
name : {
type: 'String',
required: true,
},
capacity : {
type: 'number',
required: true,
},
contact : {
type: 'number',
required: false,
},
type : {
type: 'String',
required: true,
},
imageURLs : [],
currentBookings : [],
description : {
type: 'String',
required: false,
},
rentPerDay : {
type: 'number',
required: true,
}
},{
timestamps: true,
});
const roomModel = mongoose.model('rooms', roomSchema);
module.exports = roomModel;
My Atlas looks like this:
I have ensured from Network Access that all IP connections are allowed (0.0.0.0/0).
This is my first API so I reckon I'm missing something basic. Can anybody help me figure this out?
Update 1:
By adding "/" in app.use, the error is gone but I'm getting empty response from the DB:
{
"rooms": []
}
Update 2:
After ensuring column names in model and DB are synchronised, still the response I'm getting is empty.

Answer 1

Here:
app.use('api/rooms', roomsRoute);
I think you need to prefix the path with a / like so:
app.use('/api/rooms', roomsRoute);
See the Express documentation for path examples.

Answer 2

The problem is with database URL. By default MongoDB gives the URL of "test" database. Updating the database name fixed the problem for me.