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rails--rails/activesupport/lib/active_support/configurable.rb
2010-08-15 02:22:38 +02:00

55 lines
1.5 KiB
Ruby

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
# Configurable provides a <tt>config</tt> method to store and retrieve
# configuration options as an <tt>OrderedHash</tt>.
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
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
# Reads and writes attributes from a configuration <tt>OrderedHash</tt>.
#
# 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
#
def config
@_config ||= ActiveSupport::InheritableOptions.new(self.class.config)
end
end
end