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APIs for mongoDB data to Update, Insert , Delete, Get Data ( Postman API Testing also )

 const express = require('express');

const app = express();

const { MongoClient, ObjectId } = require('mongodb')


// API for get data start

const url = "mongodb://localhost:27017/";

app.get('/', (req, res) =>{

  MongoClient.connect(url, function(err, db) {

    if (err) throw err;

    var dbo = db.db("vasu"); // here vasu is database name

    dbo.collection("tnl_register").find().toArray(function(err, result) {

      if (err) throw err;

      console.log(result);

      res.send(result);

      db.close();

    });

  });

});



// API for get one record start

app.get('/:id', (req, res) =>{

  MongoClient.connect(url, function(err, db) {

    if (err) throw err;

    var dbo = db.db("vasu");

    const query = {"_id": ObjectId(req.params.id)};

    dbo.collection("tnl_register").findOne(query, (err, result) => {

      if (err) throw err;

      console.log(result);

      res.send(result);

      db.close();

    });

  });

});

// API for get one record end


// API for insert one record start

app.post('/', (req, res) =>{

  MongoClient.connect(url, function(err, db) {

    if (err) throw err;

    var dbo = db.db("vasu"); // here vasu is database name db is returned by callface fucntion and another db is predefined 

    const query = {name: req.headers.name, email: req.headers.email, mobile: req.headers.mobile };

    dbo.collection("tnl_register").insertOne(query, (err, result) => {

      if (err) throw err;

      console.log(result);

      res.send('Inserted ID : '+result.insertedId);

      db.close();

    });

  });

});

// API for insert one record end


// API for delete one record start

app.delete('/:id', (req, res) =>{

  MongoClient.connect(url, function(err, db) {

    if (err) throw err;

    var dbo = db.db("vasu"); //here vasu is database name and another db is predefined

    const query = {_id: ObjectId(req.params.id)};

    dbo.collection("tnl_register").deleteOne(query, (err, result) => {

      if (err){

        res.send('error');

      }else{

        if(result.deletedCount === 1){

          res.send('One record deleted!');

        }else{

          res.send('not delete!');

        }

      }

      db.close();

    });

  });

});

// API for delete one record end


// API for update one record start

app.put('/:id', (req, res) =>{

  MongoClient.connect(url, function(err, db) {

    if (err) throw err;

    var dbo = db.db("vasu"); // here vasu is database name and another db is predefined.

    const id = {_id: ObjectId(req.params.id)};

    const query = {$set: {name: req.headers.name, email: req.headers.email, mobile: req.headers.mobile }};

    dbo.collection("tnl_register").updateOne(query, id, (err, result) => {

      if (err){

        res.send('error');

      }else{

        res.send(result);

      }

      db.close();

    });

  });

});

// API for update one record end


app.listen(3000)

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