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configurable.rb
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configurable.rb
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require 'active_support/concern'
require 'active_support/ordered_options'
require 'active_support/core_ext/kernel/singleton_class'
require 'active_support/core_ext/module/delegation'
module ActiveSupport
module Configurable
extend ActiveSupport::Concern
module ClassMethods
def config
@_config ||= ActiveSupport::InheritableOptions.new(superclass.respond_to?(:config) ? superclass.config : {})
end
def configure
yield config
end
# Allows you to add shortcut so that you don't have to refer to attribute through config.
# Also look at the example for config to contrast.
#
# class User
# include ActiveSupport::Configurable
# config_accessor :allowed_access
# end
#
# user = User.new
# user.allowed_access = true
# user.allowed_access # => true
#
def config_accessor(*names)
names.each do |name|
code, line = <<-RUBY, __LINE__ + 1
def #{name}; config.#{name}; end
def #{name}=(value); config.#{name} = value; end
RUBY
singleton_class.class_eval code, __FILE__, line
class_eval code, __FILE__, line
end
end
end
def config
@_config ||= ActiveSupport::InheritableOptions.new(self.class.config)
end
end
end