Getting TypeError: User is not a constructor when testing user add with API

Question

I am trying to make my backend work with MongoDB ATLAS. I'm using express, mongoose and node.js for my tests and when I am trying to test my API routes (in this case to add a user)

The code I have is the following:

users.js

 const router = require('express').Router(); const { Router } = require('express'); let User = require('../models/user.model'); router.route('/').get((req, res) => { User.find().then(users => res.json(users)).catch(err => res.status(400).json('Error: ' + err)); }); router.route('/add').post((req, res) => { const username = req.body.username; const newUser = new User({username}); newUser.save().then(() => res.json('User added.')).catch(err => res.status(400):json('Error; ' + err)); }). module.exports = router

user.model.js

 const mongoose = require('mongoose'); const Schema = mongoose.Schema; const userSchema = new Schema({ username: { type: String, required: true, unique: true, trim: true, minlength: 3 }, }, { timestamps: true, }); const User = mongoose.model('User', userSchema); module.exports = User;

server.js

 const express = require('express'); const cors = require('cors'); const mongoose = require('mongoose'); require('dotenv').config(); const app = express(); const port = process.env.PORT || 5000; app.use(cors()); app.use(express.json()); const uri = process.env.ATLAS_URI; mongoose.connect(uri, { useNewUrlParser: true, useCreateIndex: true } ); const connection = mongoose.connection; connection.once('open', () => { console.log("MongoDB database connection established successfully"); }) const exercisesRouter = require('./routes/exercises'); const usersRouter = require('./routes/users'); app.use('/exercises', exercisesRouter); app.use('/users', usersRouter); app.listen(port, () => { console.log(`Server is running on port: ${port}`); });

When I am testing this with postman via a POST I get the following error: I am getting the following error: TypeError: User is not a constructor

The post is done to http over port 5000 with raw json body as "username": "blahblahblah"

Can you help with this maybe?

Answer 1

I am not sure what happened but today I cut and pasted back all the code and the API started to work just fine. Now I can add users without any problems.

Could be a glitch but not sure at this point.