diff options
Diffstat (limited to 'activesupport/lib/active_support/configurable.rb')
| -rw-r--r-- | activesupport/lib/active_support/configurable.rb | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/activesupport/lib/active_support/configurable.rb b/activesupport/lib/active_support/configurable.rb index a8aa53a80f..4fb8c7af3f 100644 --- a/activesupport/lib/active_support/configurable.rb +++ b/activesupport/lib/active_support/configurable.rb @@ -37,29 +37,77 @@ module ActiveSupport 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. + # 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. + # + # Defines both class and instance config accessors. # # class User # include ActiveSupport::Configurable # config_accessor :allowed_access # end # + # User.allowed_access # => nil + # User.allowed_access = false + # User.allowed_access # => false + # # user = User.new + # user.allowed_access # => false # user.allowed_access = true # user.allowed_access # => true # + # User.allowed_access # => false + # + # The attribute name must be a valid method name in Ruby. + # + # class User + # include ActiveSupport::Configurable + # config_accessor :"1_Badname" + # end + # # => NameError: invalid config attribute name + # + # To opt out of the instance writer method, pass <tt>instance_writer: false</tt>. + # To opt out of the instance reader method, pass <tt>instance_reader: false</tt>. + # + # class User + # include ActiveSupport::Configurable + # config_accessor :allowed_access, instance_reader: false, instance_writer: false + # end + # + # User.allowed_access = false + # User.allowed_access # => false + # + # User.new.allowed_access = true # => NoMethodError + # User.new.allowed_access # => NoMethodError + # + # Or pass <tt>instance_accessor: false</tt>, to opt out both instance methods. + # + # class User + # include ActiveSupport::Configurable + # config_accessor :allowed_access, instance_accessor: false + # end + # + # User.allowed_access = false + # User.allowed_access # => false + # + # User.new.allowed_access = true # => NoMethodError + # User.new.allowed_access # => NoMethodError def config_accessor(*names) options = names.extract_options! names.each do |name| + raise NameError.new('invalid config attribute name') unless name =~ /^[_A-Za-z]\w*$/ + reader, line = "def #{name}; config.#{name}; end", __LINE__ writer, line = "def #{name}=(value); config.#{name} = value; end", __LINE__ singleton_class.class_eval reader, __FILE__, line singleton_class.class_eval writer, __FILE__, line - class_eval reader, __FILE__, line unless options[:instance_reader] == false - class_eval writer, __FILE__, line unless options[:instance_writer] == false + + unless options[:instance_accessor] == false + class_eval reader, __FILE__, line unless options[:instance_reader] == false + class_eval writer, __FILE__, line unless options[:instance_writer] == false + end end end end @@ -79,7 +127,6 @@ module ActiveSupport # # user.config.allowed_access # => true # user.config.level # => 1 - # def config @_config ||= self.class.config.inheritable_copy end |