Module: ClassSettingsMixinClassMethods

Includes:
SingletonMethodCreatorMixin
Defined in:
lib/class_settings_mixin.rb

Instance Method Summary collapse

Methods included from SingletonMethodCreatorMixin

#create_singleton_method, #create_singleton_value_method

Instance Method Details

#create_class_settings_method(name) ⇒ Object

Allow you to define methods that set a class value hash and an accessor for that hash.

Example:

create_class_settings_method :settings

creates:

settings

A class method that allows you to set variables

settings?

The current value of those variables

class BlueCar
  create_class_settings_method :settings
  create_class_settings_method :has_these

  settings :color => :blue, :another_settting => 10
  settings :painted => true
  has_these :doors, :windows
  has_these :wheels
end

class Convertable < BlueCar
  has_these :poptop
end

BlueCar.color
  => :blue

BlueCar.new.settings?
  => {:color => :blue, :painted => true, :another_settting => 10}



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# File 'lib/class_settings_mixin.rb', line 45

def create_class_settings_method name
  # Build the class methods first
  l = class_setting_lambda name
  create_singleton_method name, l
  
  # Allow #name? to be called as an instance method
  # and default its return value to nil.
  # This will be replaced on any call to the 
  # setter.
  value_name = value_field_identifier(name)
  instance_method = lambda {nil}
  define_method value_name, instance_method
end