issues with error messages while validating the form field in express js

In case of any validation errors I want to display appropriate error message in the same jade page(i.e register.jade).If not then I want to store the data with the help of schema object succesfully and return to my home page. But currently, I am getting all the error messages even though the inputs are correct.

I am using Express+Node+Mongodb+Mongoose.

May I know how to achieve it.

Relevant (12:55 min) video which i am following is - https://www.youtube.com/watch?v=jeiP4jN1mfs&list=PLNiY_2deiFolObKp8sav6TmxnnjVFuwqu&index=16

Here is my code -

app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var expressValidator = require('express-validator');
var cookieParser = require('cookie-parser');
var session=require('express-session');
var passport=require('passport');
var LocalStrategy = require('passport-local').Strategy;
var bodyParser = require('body-parser');

var multer = require('multer');

var upload = multer({ dest: './uploads' });
var flash = require('connect-flash');
var mongo = require('mongodb');
var mongoose = require('mongoose');
var db = mongoose.connection;

var index = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');


// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

//Handle Express Sessions
app.use(session({
    secret:'secret',
    saveUninitialized:true,
    resave:true
}));

//Passport
app.use(passport.initialize());
app.use(passport.session());

//Validator
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.')
      , root    = namespace.shift()
      , formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));


app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use(flash());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});
app.use('/', index);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

---

users.js(inside routes folder)

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


var User = require('../models/user');
/* GET users listing. */
router.get('/', function(req, res, next) {
  res.send('respond with a resource');
});

router.get('/register', function(req, res, next) {
  res.render('register',{
    'title': 'Register'
      });
});
router.get('/login', function(req, res, next) {
  res.render('login',{
    'title': 'Login'
      });
});

router.post('/register',function(req,res,next){
    //Get form values
    var name=req.body.name;
    var email=req.body.email;
    var username=req.body.username;
    var password=req.body.password;
    var password2=req.body.password2;



    if(req.files && req.files.profileimage){
        console.log('Uploading FIle...');

        //FIle Info
        var profileImageOriginalName    = req.files.profileimage.originalname;
        var profileImageName            = req.files.profileimage.name;
        var profileImageMime            = req.files.profileimage.mimetype;
        var profileImagePath            = req.files.profileimage.path;
        var profileImageExt             = req.files.profileimage.extension;
        var profileImageSize            = req.files.profileimage.size;
    } else{
        // Set a Default Image
        var profileImageName = 'noimage.png';
    }

    //Form Validation

    req.checkBody('name','Name field is required').notEmpty();
    req.checkBody('email','Email field is required').notEmpty();
    req.checkBody('email','Email not valid').isEmail();
    req.checkBody('username','Username field is required').notEmpty();
    req.checkBody('password','password field is required').notEmpty();
    req.checkBody('password2','passwords do not match').equals(req.body.password);

    //Check for errors
    var errors = req.validationErrors();

    if(errors){
        res.render('register',{
            errors:errors,
            name:name,
            email:email,
            username:username,
            password:password,
            password2:password2
        });
    }
    else{
        var newUser = new User({
            name:name,
            email:email,
            username:username,
            password:password,
            profileimage:profileImageName

        });

        //Create User
        User.createUser(newUser, function(err,user){
            if(err) throw err;
            console.log(user);
        });

        //Success Messsage 
        req.flash('success','You are now registered and may log in');

        res.location('/');
        res.redirect('/');
    }
});
module.exports = router;

---

register.jade inside views folder

extends layout

block content
    h1 Register
    p Please Register using the form below
    ul.errors
        if errors
            each error, i in errors
                li.alert.alert-danger #{error.msg}
    form(method='post',action='/users/register',enctype='multipart/form-data')
        .form-group
            label Name
            input.form-control(name='name', type='text',placeholder='Enter Name')
        .form-group
            label Email
            input.form-control(name='email', type='email',placeholder='Enter Email')
        .form-group
            label Username
            input.form-control(name='username', type='text',placeholder='User Name')
        .form-group
            label Password
            input.form-control(name='password', type='password',placeholder='Enter Password')
        .form-group
            label Confirm Password
            input.form-control(name='password2', type='password',placeholder='Confirm Password')
        .form-group
            label Profile Image
            input.form-control(name='profileimage', type='file')
        input.btn.btn-default(name='submit',type='submit',value='Register')

via Suraj