Using Redis for caching & session management with Ruby on Rails

This article shows about cacing data & session management with Ruby on Rails.

🎃 Installation

Add the following “redis-rails“ to your Gemfile:

# Redis stores
gem 'redis-rails'

Let’s execute bundle install on your terminal.

😼 Usage

Add the following to your environment variable or .env:

REDIS_URL="redis://localhost:6379/0/cache"

Configure to use Redis for cache store is as follows:

# config/application.rb
# expires_in is optional
config.cache_store = :redis_store, ENV.fetch('REDIS_URL'), { expires_in: 90.minutes }

If you want to use Redis as a backend for sessions, you should also set:

# config/initializers/session_store.rb
MyApplication::Application.config.session_store :redis_store, servers: "redis://localhost:6379/0/session"

If you want to skip to cache on TEST environment, please set NullStore:

# config/environments/test.rb:
config.cache_store = :null_store

Happy Hacking!

👽 Special Thanks

• caching - is Rails.cache purged between tests? - Stack Overflow
• http://morizyun.github.io/blog/redis-rails-session-ruby/

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