PassportJS Local Strategy not working Withh MongoDB - node.js

Question

I'm trying to get a handle on user authentication with PassportJS, and I cannot get it to work my database setup.
I'm using MongoDB without Mongoose, and I can't get the LocalStrategy module to work.
Hopefully my database queries aren't too cumbersome to read.
Local Strategy:
passport.use(new LocalStrategy(
function(username, password, done) {
//Fire up database
mongo.connect("mongodb://localhost:27017/formulas", function(e, db) {
if (e) {return next(e);}
var col = db.collection("users");
//Do a database query to find a record by username
col.findOne({"username": username}, function(err, user){
if (err) { return done(err);}
if(!user) {
return done(null, false, { message: "Please check your log in credentials." });
}
//if it exists call done() object with user information
bcrypt.compare(password, user.password, function(err, res){
if (err) throw err;
if (res == true) {
return done(null, {username: username, password: password});
} else {
return done(null, false, { message: "Invalid password."});
}
});
});
});
}));
I call passport.authenticate() like this:
router.post('/login',
passport.authenticate('local', {successRedirect:'/', failureRedirect:'/about',failureFlash: false}),
function(req, res){
console.log(req.body);
console.log(req.user);
console.log("The user was logged");
});
SerializeUser and deserializeUser look like this:
passport.serializeUser(function(user, done) {
done(null, user.username);
});
passport.deserializeUser(function(id, done) {
mongo.connect("mongodb://localhost:27017/formulas", function(e, db){
if (e) {return next(e);}
var col = db.collection("users");
col.findOne({"username": id}, function(err, user){
done(err, {"username": id});
});
});
});
When I call app.post(/login) I'm taken directly to /about and nothing is logged to the console so I'm not quite sure what's going wrong.
Advice on what to fix or how to troubleshoot is greatly appreciated.

Answer 1

Firstly when u serialize user object , then in deserialize also whole user object must be passed.
Consider the example below.
For routes :
router.post('/login', function(req, res, next) {
passport.authenticate('local', function(err, user, info) {
if (err) { return next(err); }
if (!user) { return res.redirect('/login'); }
req.logIn(user, function(err) {
if (err) { return next(err); }
req.session.user = req.user;
return res.redirect('/home');
});
})(req, res, next);
});
For passport.js , place the localstrategy and passport in same folder
var passport = require('passport'),
session = require('express-session');
var local = require('./localstrategy.js');
module.exports = function (app) {
app.use(session({
secret: 'Site visit',
resave: true,
saveUninitialized: true,
cookie: { secure: false }
}));
app.use(passport.initialize());
app.use(passport.session());
passport.serializeUser(function(user, done){
done(null, user);
});
passport.deserializeUser(function(user, done){
done(null, user);
});
local();
};
For local strategy :
'use strict';
var passport = require('passport'),
local = require('passport-local').Strategy;
var user;
// path where the db.js is placed
var db = require('./../db.js');
var ObjectId = db.getObjectID();
var bcrypt = require('bcrypt');
module.exports = function(){
passport.use(new local({
usernameField : 'username',
passwordField : 'password'
}, function(username, password, done){
var collection = db.getDb().collection('users');
collection.findOne({
username: username,
}, function (err, result) {
if(result == null){
cb(null, false);
}else {
bcrypt.compare(password, result.password, function (err, passRes) {
if (passRes == true) {
user = user;
done(err, user);
}else{
done(null, false, { message : 'Invalid Password'});
}
});
}
});
}));
};