Basic GET API with MongoDB

 

 

 

Basic Get API 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

• # Make POST method for API
  
• # Send data from postman
  
• # Get data in nodejs by request
• # write code for insert data in MongoDB

 

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.

 

 

const express = require('express')
const dbConnect = require('./mongodb/mongodb')

const app = express();

app.get('/', async(req, resp) => {
    let data = await dbConnect();
    data = await data.find().toArray();
    console.log(data)
    resp.send({ name : "Atul" })
});

app.listen(5000)

 

 

app.get() method we can also say it is routing method. Here we are combining express with mongoDB.


req parameter we have to used for to Get Data in API.
resp parameter will respond to the API.

when we run in our browser with the port 5000 and in our browser are displaying json data.

 

If you want more information about async and await - CLICK HERE

 

 

 

 

if we change something in one line of code like this resp.send(data) and refresh the browser and see in your browser and vs code terminal.

 

 

 

 

 if we check in Postman  you can check with api url like http://localhost:5000/

 

 

 

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