ArRedis

ArRedis allows you to easily create and remove nested, namespaced Redis keys under ActiveRecord objects and classes. The functionality is inspired by this RailsConf presentation by Obie Fernandez. Also, Nest is a similar gem that does not hook into ActiveRecord.

Installation

Add this line to the Gemfile of an application that uses ActiveRecord:

gem 'ar_redis'

And then execute:

$ bundle

If you are not using Redis in you application yet, setup the redis-rb gem.

Usage

All ActiveRecord models will be provided with the method #redis.

Given:

class TestModel < ActiveRecord::Base
end

You can now create nested, namespaced Redis keys that have access to all Redis commands.

>> test_model = TestModel.create
>> #<TestModel:0x007fc08a466890 id: 1>

>> test_model.redis.key
=> "TestModel:1"

>> test_model.redis[:reports]["01/2018"].key
=> "TestModel:1:reports:01/2018"

>> test_model.redis[:reports]["01/2018"].call(:set, { clicks: 12, views: 100 }.to_json)
=> "OK"

>> JSON.parse(test_model.redis[:reports]["01/2018"].call(:get))
=> { clicks: 12, views: 100 }

Configuring your Redis Client

Here's an example of how you can pass a specific Redis client to ArRedis

# initializers/redis.rb
$redis = Redis.new(host: "10.0.1.1", port: 6380, db: 15)
ArRedis.redis = $redis

Contributing

Write some code!

1. Fork ArRedis
2. Create a topic branch - git checkout -b my_branch
3. Push to your branch - git push origin my_branch
4. Create a Pull Request from your branch
5. That's it!

If you're not doing some sort of refactoring, a CHANGELOG entry is appropriate. Please include them in pull requests adding features or fixing bugs.

Tests

We use rspec for testing.

A simple bundle exec rspec will run all the tests. Make sure they pass when you submit a pull request.

License

The gem is available as open source under the terms of the MIT License.