Node js MongoDB Update Data Using Mongoose Tutorial

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Nov 25, 2022

Hello Friends,

This tutorial will provide an example of node js MongoDB update data using the mongoose tutorial. I would like to share with your the update or edit data in MongoDB using node.js. I explained simply how to use update() in mongoose. I’m going to show you about updating documents in mongoose.

This tutorial will create a table using the bootstrap 4 libraries and display a list with the edit button. Then create a route and import it in app.js file to fetch and update data from MongoDB in node js express app.

Step 1: Create Node Express js App

Execute the following command on the terminal to create the 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 mongoose 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 mongoose
npm install express-validator cors --save

body-parser – Node.js request body parsing middleware which parses the incoming request body before your handlers, and makes it available under req.body property. In other words, it simplifies incoming requests.

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 a database.js file in 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/users', {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) {
    userModel.find((err, docs) => {
        if (!err) {
            res.render("users/list", {
                data: docs
            });
        } else {
            console.log('Failed to retrieve the Users List: ' + err);
        }
    });
});

 
// 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/list')
        }
    });
})

 
// 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/list');
                }
                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 + '
'
        })
        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
        })
    }
})

 
module.exports = router;

Step 6: Create Views

Create some views; so visit the views directory of your app and create a list.ejs and edit.js file into it.

Create List Page

Create HTML markup for display list from MongoDB database; visit the views directory and create a list.ejs file inside it. Then add the following code into it:

<!DOCTYPE html>
<html>
    <head>
        <title>Fetch and display data in hmtl table 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> </td>
                </tr>
                <% }
            }else{ %>
            <tr>
                <td colspan="3">No user</td>
            </tr>
            <% } %>
            </tbody>
        </table>
    </body>
</html>

Create Edit Page

Create an HTML form for displaying edit user data in the MongoDB database; visit the views directory and create an edit.ejs file inside it. Then add the following code into it:

<!DOCTYPE html>
<html>
    <head>
        <title>node js edit data mongodb database - tutsmake.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>

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('/list', 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 the 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/list