Node js + express js + MongoDB with mongoose crud; Through this tutorial, i am going to show you how to create crud operations application in node js express and MongoDB mongoose.
Node js Express + Mongodb + CRUD Application With Mongoose Tutorial
- Step 1 - Create Node Express js App
- Step 2 - Install express Validator flash ejs body-parser mongoose dependencies
- Step 3 - Connect App to MongoDB
- Step 4 - Create Model
- Step 5 - Create Fetch Insert Update Delete Routes
- Step 6 - Create Views
- Step 7 - Import Modules in App.js
- Step 8 - Start App Server
Step 1 - Create Node Express js App
Execute the following command on terminal to create node js app:
mkdir my-app cd my-app npm init -y
Step 2 - Install express flash Validator ejs body-parser mongoose Modules
Execute the following command on the terminal to express flash ejs body-parser mysql dependencies :
npm install -g express-generator npx express --view=ejs npm install npm install express-flash --save npm install express-session --save npm install body-parser --save npm install express-validator cors --save npm install mongoose
body-parser – Node.js request body parsing middleware which parses the incoming request body before your handlers, and make it available under req.body property. In other words, it simplifies the incoming request.
Express-Flash – Flash Messages for your Express Application. Flash is an extension of connect-flash with the ability to define a flash message and render it without redirecting the request.
Express-Session– Express-session - an HTTP server-side framework used to create and manage a session middleware.
Express-EJS– EJS is a simple templating language which is used to generate HTML markup with plain JavaScript. It also helps to embed JavaScript to HTML pages
Mongoose – Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Mongoose supports both promises and callbacks.
Recommended:-Node.js Insert Form Data into MongoDB using Mongoose
Step 3 - Connect App to MongoDB
Create database.js file into your app root directory and add the following code into it to connect your app to the mongodb database:
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/test', {useNewUrlParser: true});
var conn = mongoose.connection;
conn.on('connected', function() {
console.log('database is connected successfully');
});
conn.on('disconnected',function(){
console.log('database is disconnected successfully');
})
conn.on('error', console.error.bind(console, 'connection error:'));
module.exports = conn;
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Step 4 - Create Model
Create Models directory and inside this directory create userModel.js file; Then add following code into it:
const mongoose = require("../database");
// create an schema
var userSchema = new mongoose.Schema({
name: String,
email:String
});
var userModel=mongoose.model('users',userSchema);
module.exports = mongoose.model("Users", userModel);
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Step 5 - Create Fetch Insert Update Delete Routes
Create fetch insert update, delete routes from MongoDB in node js; so visit routes directory and open users.js route file; Then add the following insert update, delete in node js MongoDB routes into it:
var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var userModel = require('../models/userModel');
/* GET home page. */
router.get('/', function(req, res, next) {
userModel.find((err, docs) => {
if (!err) {
res.render("users", {
data: docs
});
} else {
console.log('Failed to retrieve the Users List: ' + err);
}
});
});
// SHOW ADD USER FORM
router.get('/add', function(req, res, next) {
// render to views/user/add.ejs
res.render('users/add', {
title: 'Add New User',
name: '',
email: ''
})
})
// ADD NEW USER POST ACTION
router.post('/add', function(req, res, next) {
req.assert('name', 'Name is required').notEmpty() //Validate name
req.assert('email', 'A valid email is required').isEmail() //Validate email
var errors = req.validationErrors()
if (!errors) { //No errors were found. Passed Validation!
var userDetails = new userModel({
name: req.body.name,
email: req.body.email,
});
userDetails.save((err, doc) => {
if (!err)
req.flash('success', 'User added successfully!');
res.redirect('/users');
else
res.render('users/add', {
title: 'Add New User',
name: user.name,
email: user.email
})
});
} else { //Display errors to user
var error_msg = ''
errors.forEach(function(error) {
error_msg += error.msg + '<br>'
})
req.flash('error', error_msg)
res.render('users/add', {
title: 'Add New User',
name: req.body.name,
email: req.body.email
})
}
})
// SHOW EDIT USER FORM
router.get('/edit/(:id)', function(req, res, next) {
userModel.findById(req.params.id, (err, doc) => {
if (!err) {
res.render("users/edit", {
title: "Update User Details",
data: doc
});
} else {
req.flash('error', 'User not found with id = ' + req.params.id)
res.redirect('/users')
}
});
})
// EDIT USER POST ACTION
router.post('/update/:id', function(req, res, next) {
req.assert('name', 'Name is required').notEmpty() //Validate nam
req.assert('email', 'A valid email is required').isEmail() //Validate email
var errors = req.validationErrors()
if (!errors) {
var user = {
name: req.sanitize('name').escape().trim(),
email: req.sanitize('email').escape().trim()
}
userModel.findByIdAndUpdate(req.body.id, {
name: req.body.name
} {
email: req.body.email
}, function(err, data) {
if (err) {
req.flash('error', 'Something Goes to Wrong!');
res.render('users');
} else {
req.flash('success', 'User has been updated successfully!');
res.redirect('/users');
}
});
} else { //Display errors to user
var error_msg = ''
errors.forEach(function(error) {
error_msg += error.msg + '<br>'
})
req.flash('error', error_msg)
/**
* Using req.body.name
* because req.param('name') is deprecated
*/
res.render('users/edit', {
title: 'Edit user',
id: req.params.id,
name: req.body.name,
email: req.body.email
})
}
})
// DELETE USER
router.get('/delete/(:id)', function(req, res, next) {
userModel.findByIdAndRemove(req.params.id, (err, doc) => {
if (!err) {
res.redirect('/users');
} else {
console.log('Failed to Delete user Details: ' + err);
}
});
})
module.exports = router;
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Step 6 - Create Views
Create a directory which name users; So visit views directory and create users directory inside it. Then create the following page inside users directory; as shown below:
- index.ejs
- add.ejs
- edit.ejs
Visit views/users directory and open index.ejs and add the following code into it:
<!DOCTYPE html>
<html>
<head>
<title>Fetch and display data in html table from mongodb in node js express</title>
<link rel='stylesheet' href='/stylesheets/style.css' />
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
</head>
<body>
<div> <a href="/" class="btn btn-primary ml-3">Home</a> </div>
<!-- <% if (messages.error) { %>
<p style="color:red"><%- messages.error %></p>
<% } %> -->
<% if (messages.success) { %>
<p class="alert alert-success mt-4">
<%- messages.success %>
</p>
<% } %>
<br>
<table class="table">
<thead>
<tr>
<th scope="col">#</th>
<th scope="col">Name</th>
<th scope="col">Email</th>
<th width="200px">Action</th>
</tr>
</thead>
<tbody>
<% if(data.length){
for(var i = 0; i< data.length; i++) {%>
<tr>
<th scope="row">
<%= (i+1) %>
</th>
<td>
<%= data[i].name%>
</td>
<td>
<%= data[i].email%>
</td>
<td> <a class="btn btn-success edit" href="../users/edit/<%= data[i]._id%>">Edit</a>
<a class="btn btn-danger delete" href="../users/delte/<%= data[i]._id%>">delete</a>
</td>
</tr>
<% }
}else{ %>
<tr>
<td colspan="3">No user</td>
</tr>
<% } %>
</tbody>
</table>
</body>
</html>
Visit views/users directory and open add.ejs and add the following code into it:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Node.js insert Data from Html Form to Mongodb Database - laratutorials.com</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
</head>
<body>
<div class="container mt-4">
<div class="card">
<div class="card-body">
<% if (messages.success) { %>
<p class="alert alert-success m2-4 mb-2"><%- messages.success %></p>
<% } %>
<form action="users/add" method="POST">
<div class="form-group">
<label for="firstName">Name</label>
<input type="text" class="form-control col-lg-9" id="name" aria-describedby="emailHelp" placeholder="Enter first name" name="name">
</div>
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control col-lg-9" id="exampleInputEmail1" aria-describedby="emailHelp" name="email" placeholder="Enter email">
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
</body>
</html>
Visit views/users directory and open edit.ejs and add the following code into it:
<!DOCTYPE html>
<html>
<head>
<title>Node.js update Data from Html Form to Mongodb Database - laratutorials.com</title>
<link rel='stylesheet' href='/stylesheets/style.css' />
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
</head>
<body>
<form action="/users/update/<%= data._id %>" method="post" name="form1">
<div class="form-group">
<label for="exampleInputPassword1">Name</label>
<input type="text" class="form-control" name="name" id="name" value="<%= data.name %>" placeholder="Name">
</div>
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" name="email" id="email" aria-describedby="emailHelp" placeholder="Enter email" value="<%= data.email %>">
</div>
<button type="submit" class="btn btn-info">Update</button>
</form>
</body>
</html>
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Step 5 - Import Modules in App.js
Import express flash session body-parser mongoose dependencies in app.js; as shown below:
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser');
var flash = require('express-flash');
var session = require('express-session');
var usersRouter = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({
extended: false
}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(session({
secret: '123456catr',
resave: false,
saveUninitialized: true,
cookie: {
maxAge: 60000
}
}))
app.use(flash());
app.use('/', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// 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;
Step 7 - Start App Server
You can use the following command to start node js app server:
//run the below command npm start after run this command open your browser and hit http://127.0.0.1:3000/
Conclusion
Node js crud mongodb example; In this tutorial you have learned how to create crud operations in node js express and mongodb mongoose.
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