HSET and HGET for fields in Redis - Mini Project: Build & Apply

Using HSET and HGET to Manage User Profiles in Redis

📖 Scenario: You are building a simple user profile system using Redis. Each user has a unique ID, and their profile information is stored as fields inside a Redis hash. You will learn how to add fields to a user's profile and retrieve specific fields using Redis commands.

🎯 Goal: Build a Redis hash for a user profile with specific fields using HSET, then retrieve a field value using HGET.

📋 What You'll Learn

Create a Redis hash key for a user profile with the key name user:1001.

Use HSET to add the fields name with value Alice and email with value [e-mail].

Create a variable called field and set it to the string email.

Use HGET with the key user:1001 and the field stored in field to get the email address.

Store the retrieved email in a variable called user_email.

💡 Why This Matters

🌍 Real World

Storing user profiles or settings in Redis hashes is common in web applications for fast access and updates.

💼 Career

Knowing how to use HSET and HGET is essential for backend developers working with Redis to manage structured data efficiently.

1

Create a Redis hash for user profile

Use the HSET command to create a Redis hash with the key user:1001 and add the field name with the value Alice.

Redis

# Use HSET to add the field 'name' with value 'Alice' to the hash 'user:1001'
# Your code here

Need a hint?

Remember, HSET syntax is: HSET key field value.

2

Add email field to the user profile

Use the HSET command to add the field email with the value [e-mail] to the Redis hash with the key user:1001.

Redis

HSET user:1001 name Alice
# Use HSET to add the field 'email' with value '[e-mail]' to the hash 'user:1001'
# Your code here

Need a hint?

You can add multiple fields to a hash by calling HSET multiple times.

3

Create a variable for the field name

Create a variable called field and set it to the string email.

Redis

HSET user:1001 name Alice
HSET user:1001 email [e-mail]

# Create a variable called 'field' and set it to 'email'
# Your code here

Need a hint?

Just assign the string 'email' to the variable field.

4

Retrieve the email field using HGET

Use the HGET command with the key user:1001 and the field stored in the variable field to get the email address. Store the result in a variable called user_email.

Redis

HSET user:1001 name Alice
HSET user:1001 email [e-mail]

field = 'email'

# Use HGET to get the value of the field stored in 'field' from 'user:1001'
# Store it in 'user_email'
# Your code here

Need a hint?

Use HGET key field to get the value. Since field is a variable, you can use its value directly.