1. Install Mongoose
First, you need to install Mongoose in your project. You can do this by running the following command in your terminal:
npm install mongoose
2. Connect to MongoDB
Once you have installed Mongoose, you need to connect to your MongoDB database. You can do this by creating a Mongoose connection object and passing it the connection string for your MongoDB database.
const mongoose = require(‘mongoose’);
mongoose.connect(‘mongodb://localhost/my_database’, {
useNewUrlParser: true,
useUnifiedTopology: true
});
3. Create a Mongoose Model
Next, you need to create a Mongoose model for the collection you want to insert data into. A Mongoose model is a constructor that creates documents.
const User = mongoose.model(‘User’, {
name: String,
age: Number
});
4. Create a Document
Once you have created a Mongoose model, you can create a document using the model’s constructor.
const user = new User({
name: ‘John Doe’,
age: 25
});
5. Save the Document
Finally, you can save the document to your MongoDB database by calling the save() method on the document.
user.save(function(err) {
if (err) return handleError(err);
// saved!
});
Save/insert data from the form into mongoDB database in node js express app; In this tutorial, you will learn how to insert/save/store data from HTML form into mongoDB database using mongoose in node js express app.
Mongoose is the best solution to insert data into MongoDB.Because It is very easy & fast. So, In this tutorial, you will find simeple and easy example to insert form data in Node.js Express.
This tutorial will create a simple form using bootstrap 4 library and then create route in app.js file for inserting data into the MongoDB database using mongoose in node js express app.
How to Insert Data into MongoDB Using Mongoose in Node.js Express
Follow the following steps to insert data into MongoDB using mongoose and node. js:
- Step 1 – Create Node Express js App
- Step 2 – Install express flash ejs body-parser mongoose dependencies
- Step 3 – Connect App to MongoDB
- Step 4 – Create Model
- Step 5 – Create Routes
- Step 6 – Create HTML Markup Form
- 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 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.
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;
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);
Step 5 – Create Routes
Create routes; so visit routes directory and open users.js route file; Then add the following 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) {
res.render('index', { title: 'add user' });
});
router.post('/add-user', 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('/');
else
console.log('Error during record insertion : ' + err);
});
}
else { //Display errors to user
var error_msg = ''
errors.forEach(function(error) {
error_msg += error.msg + '<br>'
})
req.flash('error', error_msg)
res.render('/', {
title: 'Add New User',
name: req.body.name,
email: req.body.email
})
}
});
module.exports = router;
Step 6 – Create HTML Markup Form
Create html form for inserting data into database; So visit views directory and create index.ejs file inside it. Then add the following code into it:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Node.js Express Save Data from Html Form to Mongodb Database - Tutsmake.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>
<% } %>
<h2>Node.js Express Save Data from Html Form to Mongodb Database - Tutsmake.com</h2>
<form action="add-user" 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>
Step 7 – 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 8 – 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
Save/insert data from form into mongoDB database in node js express app; In this tutorial, you have learned how to insert/save/store data from HTML form into mongoDB database using node js express app.
