Unable to use sessions in node.js - node.js

Question

I developing login page.
If user successfully logs in , then I want to store user_Id into session variable,which I will be using to authenticate other pages.
App.js
var express = require('express');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var passport = require('passport');
var cookieParser = require('cookie-parser');
var session = require('express-session');
app.use(bodyParser.json());
app.use('/user', userRoutes);
app.use('/', index);
app.use(cookieParser());
app.use(session({
secret: "helloKey",
resave: false,
saveUninitialized: true,
store: new MongoStore({ mongooseConnection: mongoose.connection}),
cookie: { maxAge: 180 * 60 * 1000 }
}));
User router
var express = require('express');
var router = express.Router();
User = require('../models/user');
//Login User
router.post('/login', function (req, res) {
var user = new User(req.body);
User.login(user, function (err, user) {
if (err) {
res.sendStatus(500);
throw err;
}
if (!user) {
res.sendStatus(404);
return;
}
req.session.name = user.id;
res.json(user.id);
});
});
Problem is if I execute this code I am getting Cannot set property 'name' of undefined
What I am doing wrong?
Please Help.

Answer 1

Problem is that your routes are already setup before session so you have to reorder the code.
Move these lines
app.use('/user', userRoutes);
app.use('/', index);
Below the app.use(session) declaration.
app.use(session({
secret: "helloKey",
resave: false,
saveUninitialized: true,
store: new MongoStore({ mongooseConnection: mongoose.connection}),
cookie: { maxAge: 180 * 60 * 1000 }
}))