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Articles tagged with #mongodb-compass
🗂️ Complete Folder Structure todo-app/ │ ├── server.js ├── package.json ├── .env │ ├── config/ │ └── db.js │ ├── models/ │ ├── User.js │ ├── Todo.js │ └── Comment.js │ ├── controllers/ │ ├── userController.js │ └── todoController.js │ ├─...
🔹 Why Do We Need populate()? In MongoDB, collections are separate.When we use referencing, we only store an ID, not full data. Example: { "passengerName": "Amit", "train": "65fae91c2b..." } This ID alone is not useful for UI. 👉 populate() help...
🔹 Why Do We Need Relationships in MongoDB? In real applications, data is connected. Real life example (Railway system 🚆): One Train has many Coaches One User can have many Bookings One Booking belongs to one Train So the question is:👉 How do ...
In the last lesson, we installed MongoDB and MongoDB Compass, and created our first database.Now, it’s time to learn the most important part of databases: CRUD operations. 👉 CRUD means: C → Create (Insert new data) R → Read (Get/Find data) U → Up...
1. What is MongoDB? MongoDB is a NoSQL database.That means it does not store data in rows and columns like MySQL or PostgreSQL. Instead, it stores data in documents (like JSON objects) inside collections. 👉 Think of it like this: Database = a big f...
