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Fetch data from MongoDB Using Mongoose and Node.js Express

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In this tutorial, you will learn to fetch data from MongoDB using Mongoose and Node.js Express with a simple example. This example will give you the best idea to fetch other bulk data from the table. Even you will get a free script to implement it.
This tutorial helps you to write the script in the Express MVC pattern. Even all the script is written with a separate Model, View & controller file that will be very easy to understand. So, You will easily learn How to fetch data from MongoDB Using Mongoose Node.js Express.

fetch data from mongodb using mongoose

How to Fetch Data From MongoDB Using Mongoose

Mongoose is the best solution to fetch MongoDB data. So, You should use it for writing the fetching query. Before getting started, you will have to configure the required things to execute Node.js Express on your computer.

Before getting started, you must configure the following basic steps

  • Install Node.js on your device
  • Install MongoDB Community Server
  • Also, Install MongoDB Compass  and create a Database with the name nodeapp & Collection with the name users
  • Insert Data into MongoDB Table

1. Install Express Application

First of all, you have to  Install Express Application. After that, create the following folders & files

nodeapp/
  |__controllers/
  |     |__fetch-controller.js
  |__models/
  |     |__fetch-model.js
  |__routes/
  |     |__fetch-route.js
  |__views/
  |     |__user-table.ejs
  |__database.js

2. Connect Node.js to MongoDB database

Now, you have to connect Node.js to the MongoDB database using the following script

File Name – database.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/nodeapp', {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;

3. Create a Model to Fetch Data

Create a model to fetch data using the following points –

  • Include mongoose module using require('mongoose')
  • Also, Include a MongoDb database connection file using require('../database')
  • Create a schema with collection columns like full_name, email_address, city & country.
  • Pass MongoDB table users & userSchema to the mongoose.model()
  • Write a mongoose query within module.exports{} to fetch data from the MongoDB database

File Name – fetch-model.js

var mongoose=require('mongoose');
var db = require('../database');
// create an schema
var userSchema = new mongoose.Schema({
            full_name: String,
            email_address:String,
            city:String,
            country:String
        });
userTable=mongoose.model('users',userSchema);
        
module.exports={
     
     fetchData:function(callback){
        var userData=userTable.find({});
        userData.exec(function(err, data){
            if(err) throw err;
            return callback(data);
        })
        
     }
}

4. Create a Controller to Fetch Data

Create a controller to fetch data using the following points –

  • Include a model file using require('../models/fetch-model')
  • Create a method fetchData within module.exports{}
  • Write mongoose query within fetchData to fetch data from the MongoDB table and pass to the view with userData

File Name – fetch-controller.js

var fetchModel= require('../models/fetch-model');
module.exports={
 
    fetchData:function(req, res){
      
      fetchModel.fetchData(function(data){
          res.render('user-table',{userData:data});
      })
    }
}

5. Display Data in HTML Table

Display data in an HTML table with the help of fetchData that comes from the controller.

File Name – user-table.ejs

<!DOCTYPE html>
<html lang="en">
<head>
  <title></title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
 <style type="text/css">
     table, td, th {  
     border: 1px solid #ddd;
     text-align: left;
   }
   
   table {
     border-collapse: collapse;
     width: 50%;
    
   }
   .table-data{
       position: relative;
     left:50px;
     top:50px;
   }
   th, td {
     padding: 15px;
   }
 </style>
</head>
<body>
<!--====form section start====-->
    <div class="table-data">
    <table border="1" >
        <tr>
            <th>S.N</th>
            <th>Full Name</th>
            <th>Email Address</th>
            <th>City</th>
            <th>Country</th>
            <th>Edit</th>
            <th>Delete</th>
        </tr>
        
        <%
        if(userData.length!=0){
        var i=1;
        userData.forEach(function(data){
        %>
        <tr>
            <td><%=i; %></td>
            <td><%=data.full_name %></td>
            <td><%=data.email_adress %></td>
            <td><%=data.city %></td>
            <td><%=data.country %></td>
            <td><a href="/edit/<%=data.id%>">Edit</a></td>
            <td><a href="/delete/<%=data.id%>">Delete</a></td>
        </tr>
        <%  i++; }) %>
        <% } else{ %>
            <tr>
                <td colspan="7">No Data Found</td>
            </tr>
        <% } %>
    </table>
    </div>
</body>
</html>

6. Create a Route to fetch Data

Create a route to fetch data with the help of the following points –

  • Include a controller file using require('../controllers/fetch-controller')
  • Create a route /fetch-data with GET method to fetch data from the MongoDB database

File Name – fetch-route

var express = require('express');
var router = express.Router();
var fetchController= require('../controllers/fetch-controller');

router.get('/fetch-data',fetchController.fetchData);

module.exports = router;

7. Include and Use the Router in app.js

Now, You have to include & use the fetched route in the main root file app.js

File Name – app.js

var fetchRouter = require('./routes/fetch-route');
app.use('/', fetchRouter);

8. Run Node.js app to Fetch Data

First, start the Node.js server. after that, Enter the following URL in your browser to display data in the HTML table

http://localhost:3000/fetch-data

My Suggestion

Dear developers, I hope you have understood the above script, Now you are able to Fetch data from MongoDB using Mongoose and Node.js express

I will share more tutorials on Node.js/Express asap. So, Continue to visit this website.

If you have any doubts or questions. You can directly ask me through the below comment box.

Related Posts:

Filed Under: Node.js

Reader Interactions

Comments

  3. Raaj Kanchan says

    You saved my day. Thank you so much for the help. Well I made a simpler version, I hope you like it.

    getAllUsers: function (req, res) {
    var userTable = User;
    var userData = userTable.find({});
    userData.exec(function(error, data){
    if(error) throw error;
    res.send(data);
    });
    },

    Here, I have saved User schema in a different file. And volla, it worked. Thank you again.

    Reply

  4. Eric says

    in your fetch-route example, it shows POST for /fetch-data but this should be a GET (router.get). Just something I noticed when I was following the tutorial.

    var express = require(‘express’);
    var router = express.Router();
    var userController= require(‘../controllers/fetch-controller’);
    router.get(‘/fetch-data’,fetchController.fetchData);
    module.exports = router;

    Reply

  5. Anthon says

    Please tell about app.js, because of that I am not able to run the file, I am getting a error please help

    Reply

    • Md Nurullah says

      You will get an app.js file with some default code. you have to only put the given code in this file. It will not give any error.
      if you get any error by doing this, please share that error in comment box

      Reply

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