Unhandled promise Rejection (rejection id: 1) - Node.js - node.js

Question

I'm new to Node.js and trying to figure out of some problems.
I've defined a signup function on a Node.js server for an Android app who writes user's info on MongoDB.
server.js
var express = require('express'),
app = express(),
port = process.env.PORT || 3000,
mongoose = require('mongoose'),
Task = require('./api/models/serverModel'),
bodyParser = require('body-parser');
var url = "mongodb://localhost:27017/ProjectDB";
mongoose.Promise = global.Promise;
mongoose.connect(url);
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
var routes = require('./api/routes/serverRoute');
routes(app);
app.listen(port);
console.log('Project RESTful API server started on: ' + port);
serverModel
var UserSchema = new mongoose.Schema({
userName: {type: String, unique: true, required: true},
email: {type: String, unique: true, required: true},
password: {type: String, required: true},
createdAt: {type: String, required: true}
});
var User = mongoose.model('User', UserSchema);
module.exports = User;
serverRoute
module.exports = function(app) {
var Project = require('../controllers/serverController');
// Project Routes
app.route('/signup')
.post(Project.signup);
};
serverController
...
mongoose.Promise = global.Promise;
exports.signup = function(req, res) {
return new Promise( function(resolve,reject) {
var user = new User({
userName: req.body.name,
password: req.body.pass,
mail: req.body.email,
createdAt : new Date()
});
user.save()
.then(function() { resolve({ status: 201, message: 'User Registered Successfully !' })})
.catch(function(err) {
if (err.code == 11000) {
reject({ status: 409, message: 'User Already Registered !' });
} else {
reject({ status: 500, message: 'Internal Server Error !' });
}
});
})};
...
It compiles without any error.
When I try to send a JSON via Postman like this:
{
"userName" : "username",
"email" : "user.name#gmail.com",
"password" : "blabla1"
}
it reports
UnhandledPromiseRejectionWarning: Unhandled promise Rejection (rejection id: 1) [object Object]
I've read tons of posts but I can't get out of this.
Any help?
Thanks.

Answer 1

Try this and revert.
server.js
var express = require('express'),
app = express(),
port = process.env.PORT || 3000,
mongoose = require('mongoose'),
Task = require('./api/models/serverModel'),
bodyParser = require('body-parser');
var url = "mongodb://localhost:27017/ProjectDB";
mongoose.Promise = global.Promise;
mongoose.connect(url);
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
var routes = require('./api/routes/serverRoute');
//change
//routes(app);
app.use('/',routes);
app.listen(port);
console.log('Project RESTful API server started on: ' + port);
serverRoute
var express = require('express');
var router = express.Router();
// GET home page.
router.post('/signup', function(req, res, next) {
var Project = require('../controllers/serverController');
Project.signup().then(function(result){
res.send(result);
}).catch(function(err){
res.send(err);
});
});
module.exports = router;