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Active Support Configurable

Configurable provides a config method to store and retrieve configuration options as an OrderedOptions.

Namespace
Methods
C

Instance Public methods

config()

Reads and writes attributes from a configuration OrderedOptions.

require "active_support/configurable"

class User
  include ActiveSupport::Configurable
end

user = User.new

user.config.allowed_access = true
user.config.level = 1

user.config.allowed_access # => true
user.config.level          # => 1

Source: show | on GitHub 

# File activesupport/lib/active_support/configurable.rb, line 155
def config
  @_config ||= self.class.config.inheritable_copy
end