app.js

var express = require('express');
var bodyParser = require('body-parser');
var path = require('path');
var expressValidator = require ('express-validator');
var mongojs = require('mongojs');
var db = mongojs('jstest', ['users']);
var morgan = require('morgan')
var ObjectId = mongojs.ObjectId;
var app = express();
var router = express.Router();

app.use(morgan(':method :url :response-time'))

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');



  
// View Engine
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));

app.get('/',function(req, res){//get,put,post,delete   
  res.render('index')
});  

app.get('/reg', function(req, res){
  res.render('reg')
});  

  
// body Parser Middleware
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));

var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// Set Static Path
app.use(express.static(path.join(__dirname, 'public')));


// Global Vars
app.use(function(req, res, next){
    res.locals.errors = null;
    next(); 
});

// Express Validator Middleware
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.get('/', function(req, res){
    db.users.find(function (err, docs) {
        res.render('index', {
            title: 'Customers',
            users: docs 
        });
})
});

app.post("/addname", (req, res) => {
    var myData = new User(req.body);
    myData.save()
    .then(item => {
    res.send("item saved to database");
    })
    .catch(err => {
    res.status(400).send("unable to save to database");
    });
   });

 app.post('/users/add', function(req, res){
     req.checkBody('first_name', 'First Name is Required').notEmpty();
     req.checkBody('last_name', 'Last Name is Required').notEmpty();
     req.checkBody('email', 'Email is Required').notEmpty();
     
     var errors = req.validationErrors();

     if (errors){
         res.render('index', {
            title: 'Customers',
            users: users,
            errors: errors
         })
    
     } else {
        var newUser = {
            first_name: req.body.first_name,
            last_name: req.body.last_name,
            email: req.body.email   
        }
db.users.insert(newUser, function(err, result){
    if(err){
        console.log(err);
    }
    res.redirect('/');
});   
}
});
app.delete('/users/delete/:id', function(req, res){
db.users.remove({_id: ObjectId(req.params.id)}, function(err, result){
    if(err){
console.log(err);
    }
    res.redirect('/');
});
});
app.listen(3000, function(){
    console.log('Server Started on Port 3000...');
})