Defra Ruby Features

A Rails Engine used by the Ruby services team in their digital services.

We use it to set, update and delete feature toggles on our rails services.

When mounted in an app, it will add additional endpoints and views to manage feature toggles.

Things to note

• We have gone with an engine rather than an additional service, to simplify management of feature toggles in our environments

Make sure you already have:

• Ruby 3.2.2
• Bundler – for installing Ruby gems

Add the engine to your Gemfile:

gem "defra_ruby_features",
    git: "https://github.com/DEFRA/defra-ruby-features"

Install it with bundle install.

Then mount the engine in your routes.rb file:

Rails.application.routes.draw do
  mount DefraRubyFeatures::Engine => "/defra-ruby-featuress"
end

The engine should now be mounted at /defra-ruby-features of your project. You can change "/defra-ruby-features" to a different route if you'd prefer it to be elsewhere.

For the feature toggles to be persisted, you need to create a model class with a String attribute called key and a Boolean attribute named active.

This will work with MongoId models as well as ActiveRecord models.

# config/initializers/defra_ruby_features.rb
require "defra_ruby_features"

DefraRubyFeatures.configure do |config|
  config.feature_toggle_model_name = "FeatureToggle"
end

The engine is mounted in a dummy Rails 6 app (in /spec/dummy) so we can properly test its behaviour.

The test suite is written in RSpec.

To run all the tests, use bundle exec rspec.

If you have an idea you'd like to contribute please log an issue.

All contributions should be submitted via a pull request.

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