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Contents
require 'active_support/concern'
module Cardboard
# Adds a class method to a class to create settings with default values.
#
# Example:
#
# class Configuration
# include Cardboard::Settings
#
# setting :site_title, "Default Site Title"
# end
#
# conf = Configuration.new
# conf.site_title #=> "Default Site Title"
# conf.site_title = "Override Default"
# conf.site_title #=> "Override Default"
#
module Settings
extend ActiveSupport::Concern
def read_default_setting(name)
default_settings[name]
end
private
def default_settings
self.class.default_settings
end
module ClassMethods
def setting(name, default)
default_settings[name] = default
attr_accessor(name)
# Create an accessor that grabs from the defaults
# if @name has not been set yet
class_eval <<-EOC, __FILE__, __LINE__ + 1
def #{name}
if instance_variable_defined? :@#{name}
@#{name}
else
read_default_setting(:#{name})
end
end
EOC
end
def default_settings
@default_settings ||= {}
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems