Mern Stack

  MongoDB is a NoSQL database that stores data in a flexible, JSON-like format called BSON (Binary JSON).  Unlike traditional relational databases like MySQL or PostgreSQL, which use tables and rows,  MongoDB uses collections and documents . Key Concepts Concept Description Database A container for collections. Collection A group of documents, similar to a table in SQL. Document A single record in a collection, stored as a JSON-like object.   Example of a document: { "name" : "Alice" , "age" : 30 , "email" : "alice@example.com" } Download it from :- https://www.mongodb.com/try/download/community for windows :- and after installation open it :- and create connection and connect it for example enter connection name as omsir :- and then connect it :- and then you will see following here just click on local you wi...

Express.js CRUD application  with: MongoDB (Mongoose)  backend Video & PDF upload Course and Lecture model EJS frontend templates Open command prompt and create project folder by using following commands :- mkdir  course-app cd  course-app and then type :- npm init -y and then   Install dependencies npm install express mongoose multer ejs dotenv method-override then you will see your project folder like this :- create config folder and create following file:- File Upload Setup multer.js  file code:- const multer = require('multer'); const path = require('path'); const storage = multer.diskStorage({   destination: function (req, file, cb) {     cb(null, 'public/uploads/');   },   filename: function (req, file, cb) {     cb(null, Date.now() + path.extname(file.originalname));   } }); module.exports = multer({ storage: storage }); and create .env file :- MONGO_URI=mongodb://localhost:27017/courseApp s...

   Express js Crud for adding courses and lectures with video upload and pdf notes with backend mongodb and front end in ejs Here's a full  Express.js CRUD application  with: MongoDB (Mongoose)  backend Video & PDF upload Course and Lecture model EJS frontend templates open your command prompt in windows :- and create  project folder as "course-app "  mkdir  course-app  cd  course-app npm init -y Then Install dependencies npm install express mongoose multer ejs dotenv method-override Project Structure :- course-app/ │ ├── public/ │   └── uploads/               # Stores videos & PDFs │ ├── views/ │   ├── courses/ │   │   ├── index.ejs │   │   ├── new.ejs │   │   └── show.ejs │   ├── lectures/ │   │   ├── new.ejs │   └── layout.ejs │ ├── models/ │   ├── Course.js │...