Redis with Node.js (ioredis) - Mini Project: Build & Apply

Simple Redis Key-Value Store with Node.js and ioredis

📖 Scenario: You are building a simple key-value store using Redis and Node.js. This store will save user preferences like theme color and language settings.

🎯 Goal: Create a Node.js script that connects to Redis using ioredis, sets some user preference keys, retrieves them, and then closes the connection.

📋 What You'll Learn

Create a Redis client using ioredis

Set at least two keys with string values in Redis

Retrieve the values of those keys

Close the Redis connection properly

💡 Why This Matters

🌍 Real World

Redis is often used for fast caching and storing session data in web applications. This project shows how to connect and interact with Redis from a Node.js backend.

💼 Career

Knowing how to use Redis with Node.js is valuable for backend developers working on scalable web apps, improving performance by caching and quick data access.

1

Setup Redis Client

Create a Redis client by importing Redis from ioredis and instantiate it with new Redis() assigned to a variable called redis.

Redis

const Redis = require('ioredis');
// Your code here

Need a hint?

Use require('ioredis') to import Redis and create a new client instance.

2

Set User Preference Keys

Use the redis.set method to set two keys: 'user:1:theme' with value 'dark' and 'user:1:language' with value 'en'.

Redis

const Redis = require('ioredis');
const redis = new Redis();
// Your code here

Need a hint?

Call redis.set twice with the exact keys and values.

3

Retrieve User Preference Values

Use await redis.get to retrieve the values of 'user:1:theme' and 'user:1:language'. Assign them to variables theme and language respectively. Wrap this code inside an async function called main.

Redis

const Redis = require('ioredis');
const redis = new Redis();

redis.set('user:1:theme', 'dark');
redis.set('user:1:language', 'en');

// Your code here

Need a hint?

Define an async function and use await redis.get to get the values.

4

Close Redis Connection

Inside the main function, after retrieving the values, close the Redis connection by calling redis.quit(). Then call the main function at the end of the script.

Redis

const Redis = require('ioredis');
const redis = new Redis();

redis.set('user:1:theme', 'dark');
redis.set('user:1:language', 'en');

async function main() {
    const theme = await redis.get('user:1:theme');
    const language = await redis.get('user:1:language');
    // Your code here
}

// Your code here

Need a hint?

Call await redis.quit() inside main and then call main() after the function.