Post API insert data in MongoDB

This blog and in upcoming blog we will see mongodb basic and how is it work with installation and after installation we should not face any problem while making Database, collection(table) and using the data in nodejs even whenever we will make API. Read data from mongodb in nodejs

• # Read Data from MongoDB
  
• # Make file for db connection
  
• # Handle Promise 

Now in this blog we will consider about mongoDB basic command which we can use to create Database, collection etc.

 What is MongoDB

MongoDB is a popular open-source NoSQL (non-relational) database management system. NoSQL means no structure like it is look like an object while in SQL it is a structure query language like SELECT CustomerName, City FROM Customers; (The SELECT statement is used to select data from a database.) But NoSQL database is useless...NOT completely because of whenever we want add extra column in database then it is possible through NoSQL MongoDB.   

MongoDB installation - CLICK HERE

MongoDB Basic Command - CLICK HERE

About MongoDB vs SQL - CLICK HERE

CRUD in MongoDB - CLICK HERE

Object Like - 

{
  "_id": {
    "$oid": "659ad46e0382148123c82841"
  },
  "name": "moto G60",
  "brand": "motorola",
  "price": 16500,
  "category": "mobile"
}

MongoDB is a type of database that helps store and manage large amounts of data in a flexible and scalable way. Unlike SQL, MongoDB doesn't require a fixed structure for the data, allowing you to store information in a more versatile format.

• MongoDB is a NoSQL database.
• The data stored in a collection
• Collection don't have row and columns
• Data is stored in the form of object.

Make new file for API

If you remember, we wrote the code for database connection and data reading in the same file. if you write coding of insert, update, delete in same function and same file then it will be very complex. so that's why we will separate file of mongoDB connection file. Like this - 

mongodb.js

const { MongoClient } = require('mongodb');
const uri = 'mongodb://127.0.0.1:27017/';
const client = new MongoClient(uri);
const dbName = 'e-comm';

async function dbConnect()
{
    //handle promises
    let result = await client.connect();
    console.log(result)
    db = result.db(dbName);  
    return db.collection("products")
}

module.exports = dbConnect;

Now after making a new file (api.js) we will write code for get api.

app.post('/', async (req, resp) => {
    resp.send({ name: "Atul Kumar" })
})

if we test this API  in postmand like this http:localhost:5000/ with post method.

you can simple run this api with nodemon api.js

According to above the image if we give json data in postman then how can we know this data comes or not in nodejs. so for this we will some changes and add middleware.

this middleware used for (app.use(express.json()) - convert data in json format in nodejs.

app.post('/', async (req, resp) => {
    console.log(req.body)
    resp.send({ name: "Atul Kumar" })
})

console.log(req.body) 

if we send the data from postman then we can check that in your vs code terminal.

Now how can we saved this data in MongoDB

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

    let data = await dbConnect();
    let result = await data.insertOne(req.body);
    
    resp.send(result)
})

 After send the data using postman and check the mongodb.

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