In this tutorial, we will teach the process of building a full-stack application using Node.js, MongoDB, and JWT authentication. This Application will allow users to perform CRUD operations (Create, Read, Update, Delete) on a MongoDB database, while also implementing user authentication using JSON Web Tokens (JWT) Step by Step.I have attached the complete Video Below. Follow the Instruction and do the project.
Nodejs express
Install Node JS
npm init
Then open the project in to the VS Code Editor by typing the following command
code .
after open up the project in to the vscode editor
Install the Express Server as back end server
npm i express
Install the bodyParser
npm i body-parser
Install the mongoDB as database
npm i mongoose
Install the bcrypt
npm i bcrypt
Install the jsonwebtoken
npm i jsonwebtoken
Create Server and Establish the Database Connection
First Create the Application index.js which manage the ports and libraries and database connection of the project. We have created the database on mongodb atlas Cloud database service which name dbsmss.attached the db connection below.
const mongoose = require("mongoose")
var routers = require('./routes/routes');
const bodyParser = require("body-parser")
const app = express()
const cors = require('cors');
const port = 5000;
const mongodatabaseURL ="mongodb://127.0.0.1:27017/dbsmss";
mongoose.connect(mongodatabaseURL,{
useNewUrlParser: true,
useUnifiedTopology: true
});
const connection = mongoose.connection
app.listen(port,()=>{
console.log("Server is running port" +port);
})
connection.once("open",()=>{
console.log("MongoDb Connected!!!......")
});
app.use(cors());
app.use(bodyParser.json());
app.use(routers);
After that you can run the server type by the following command.using following command
node index.js
After that Create the Folder Routes inside the Route folder create Route file
router.js
const express = require("express")
const router = express.Router();
var studentModel = require('../src/student/studentModel');
const Student = require("../src/student/studentModel");
const auth = require("../middleware/auth");
router.post("/students/login", async (req,res)=>{
try{
const student = await Student.findByCredentials(req.body.name,req.body.password)
const token = await student.generateAuthToken()
res.send({student,token})
}
catch(error)
{
res.status(401).send()
}
})
//Add Rrcords
router.post('/student/create', async (req, res) => {
try {
const student = new studentModel(req.body);
await student.validate(); // Validate the input data
await student.save();
res.status(201).send({
status: true,
message: "Student Created!!!!!!!!!!!!!!!!"
});
} catch (error) {
res.status(400).send(error);
}
});
//View Records
router.get('/students',auth, async(req,res)=>{
try{
const students = await studentModel.find({});
res.send(students);
}
catch(error)
{
res.status(400).send(error);
}
});
//find records
router.get('/students/me',auth, async(req,res)=>{
try{
const _id = req.student._id;
const students = await studentModel.findById({_id});
if(!students)
{
return res.status(404).send();
}
return res.status(200).send(students);
}
catch(error)
{
res.status(400).send(error);
}
});
//update records
router.patch('/students/:id',auth, async(req,res)=>{
try{
const _id = req.params.id;
const body = req.body;
const updatestudents = await studentModel.findByIdAndUpdate(_id,body,{new:true});
if(!updatestudents)
{
return res.status(404).send();
}
res.status(201).send(
{
"status" : true,
"message" : "Student updateddd!!!!!!!!!!!!!!!!"
});
}
catch(error)
{
res.status(400).send(error);
}
});
//delete records
router.delete('/students/:id', async(req,res)=>{
try{
const _id = req.params.id;
const deletestudents = await studentModel.findByIdAndDelete(_id);
if(!deletestudents)
{
return res.status(404).send();
}
res.status(201).send(
{
"status" : true,
"message" : "Student Deletedd!!!!!!!!!!!!!!!!"
});
}
catch(error)
{
res.status(400).send(error);
}
});
router.post('/students/logout',auth, async(req,res)=>{
try{
req.student.tokens = req.student.tokens.filter((token)=>{
return token.token !== req.token;
})
await req.student.save()
res.send()
}
catch(error)
{
res.status(400).send(error);
}
});
module.exports = router;
Create Model
StudentModel.js
const mongoose = require("mongoose")
const bcrypt = require( 'bcrypt' );
const jwt = require("jsonwebtoken")
var Schema = mongoose.Schema;
var studentSchema = new Schema(
{
name: {
type:String,
required: true
},
address: {
type:String,
required: true
},
phone: {
type:Number,
required: true
},
password:{
type: String,
trim: true,
required : true
},
tokens:[
{
token:{
type:String,
}
}
]
}
)
studentSchema.pre("save", async function (next) {
const student = this;
if (student.isModified("password")) {
student.password = await bcrypt.hash(student.password, 8);
}
next();
});
studentSchema.statics.findByCredentials = async (name,password)=>{
const student = await Student.findOne({name})
const isMatch = await bcrypt.compare(password,student.password)
if(!isMatch)
{
throw new Error()
}
return student
}
studentSchema.methods.generateAuthToken = async function(){
const student = this;
const token = jwt.sign({_id: student._id.toString()},"mysecret")
student.tokens = student.tokens.concat({token})
await student.save()
return token;
}
const Student = mongoose.model('student',studentSchema);
module.exports = Student
Auth
create the folder middleware inside the folder implement the auth
const jwt = require("jsonwebtoken")
const Student = require("../src/student/studentModel")
const auth = async(req,res,next)=>{
try
{
const token = req.header("Authorization").replace("Bearer ","")
const decoded = jwt.verify(token,"john2")
const student = await Student.findOne(
{
_id:decoded._id,
"tokens.token":token
})
if(!student){
throw new Error()
}
req.student = student;
next()
}
catch(error)
{
res.status(401).send({error: "Please Auth"})
}
}
module.exports = authi have attached the video link below. which will do this tutorials step by step.
