Using Mongoose with Node.js

1. Introduction

Mongoose is an Object Data Modeling (ODM) library for MongoDB and Node.js, providing a straightforward way to model your application data. It offers schema-based solutions for data validation, type casting, and more.

2. Installation

To use Mongoose, you need to install it along with Node.js. Follow the steps below:

1. Open your terminal.
2. Create a new Node.js project using npm init -y.
3. Install Mongoose with the command:

npm install mongoose

3. Creating a Schema

A schema defines the structure of the data you will store in MongoDB. Below is an example:

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
    name: { type: String, required: true },
    email: { type: String, required: true, unique: true },
    password: { type: String, required: true },
    createdAt: { type: Date, default: Date.now }
});

4. Creating a Model

Once you have defined your schema, you can create a model from it:

const User = mongoose.model('User', userSchema);

5. CRUD Operations

Mongoose makes it easy to perform CRUD operations. Here are examples for each operation:

5.1 Create

const createUser = async () => {
    const user = new User({
        name: 'John Doe',
        email: 'john@example.com',
        password: 'securepassword'
    });
    await user.save();
};

5.2 Read

const getUser = async (id) => {
    const user = await User.findById(id);
    console.log(user);
};

5.3 Update

const updateUser = async (id, updateData) => {
    await User.findByIdAndUpdate(id, updateData);
};

5.4 Delete

const deleteUser = async (id) => {
    await User.findByIdAndDelete(id);
};

6. Best Practices

• Use proper schema validation to enforce data integrity.
• Utilize indexes for improved query performance.
• Write modular code by separating database logic from application logic.
• Handle errors gracefully using try-catch blocks.

7. FAQ