configuring a global flipper instance

flipper.rb

# config/initializers/flipper.rb
Flipper.configure do |config|
  config.default do
    adapter = Flipper::Adapters::ActiveRecord.new
    Flipper.new(adapter)
  end
end

# This setup is primarily for first deployment, because consequently 
# we can add new features from the Web UI. However when the DB is changed/crashed
# or in dev mode. This will immediately migrate the default features to be controlled. 
def setup_features(features)
  features.each do |feature|
    if Flipper[feature].exist?
      return
    end
    
    # Disable feature by default
    Flipper[feature].disable
  end
end

# A list of features to be deployed on first push
features = ['Feature One', 'Feature Two', 'Feature Three']

if ActiveRecord::Base.connection.data_source_exists? 'flipper_features'
  setup_features(features)
end