yoppi/redisable

Thin wrapper library for Redis, enable any Ruby class to access Redis.

Redisable

Thin wrapper library for Redis, enable any Ruby class to access Redis.

Installation

Add this line to your application's Gemfile:

gem 'redisable'

And then execute:

$ bundle

Or install it yourself as:

$ gem install redisable

Usage

Use in Rails application. Below redis settings in config/redis.yml.

# condig/redis.yml
development:
  host: localhost
  port: 6379
  db: 1
test:
  host: localhost
  port: 6379
  db: 0
production:
  master_name: apps
  failover_reconnect_timeout: 30
  sentinels:
    - host: redis1.example.com
      port: 26379
    - host: redis2.example.com
      port: 26379

Then, initialize Redisable at config/initializers/redis.rb.

Redisable::Config.load YAML.load_file(File.join(Rails.root, "config/redis.yml"))

In model, users, User is ActiveRecord object, but some user_status is ephemeral or volatile data, so won't record to RDBMS. Below code is store user_stauts in Redis.

class User < ActiveRecord::Base
  def user_status
    @user_status ||= UserStatus.new(id)
  end
end

class UserStatus < ActionController::Base
  include Redisable
  redis_key :followers_ids
  redis_key :unread_news_ids

  def initialize(id)
    @user_id = id
  end

  def id
    @user_id
  end

  def followers
    redis.get followers_ids
  end

  def unread_news
    redis.lrange unread_news_ids, 0, -1
  end
  ...
end

class UsersController
  def show(id)
    user_status = current_user.user_status
    user_status.followers
    user_status.unread_news
  end
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request