Getting Error while using Postman

[saditsnigdho]

I am trying to test an API that I saw in a video by freecodecamp. I have a script called “server.js” and under the directory of routes, I have “users.js” and a “user.model.js” script under a directory called “models”.

I ran a POST request through Insomnia using JSON (attaching the image).

Code for “server.js” is:

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");

})

app.listen(port, () => {

    console.log(`Server is running on port: ${port}`);

});

Code for “user.model.js” is:

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;

Code for “users.js” is:

const router = require('express').Router();

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;

Overall, I do not know where I committed the error. Did exactly what I was told. When I run the server.js, it says database connection is established successfully. (Cannot do that as there is a limit of posting more than one image but I did it accordingly)

Thanks in Advance!

[jenovs]

I can’t see where you are importing routes in the server.js file.

[saditsnigdho]

Probably that is my error. Can you please kindly tell me what to include? Also are there other errors?

[Banhawy]

You need to import your users router in your server.js file. Use it after you define the express app and before you listen on a port.

const express = require('express');

const cors = require('cors');

const mongoose = require('mongoose');

require('dotenv').config();

const userRouter = require('./users.js')

const app = express();
....
// this tells express to use the routes defined in users.js whenever a request comes to an endpoint starting with '/users'
app.use('/users', userRouter); 
....
app.listen(port, () => {

    console.log(`Server is running on port: ${port}`);

});