Module: DataMapper::Is::Localizable

Defined in:
lib/dm-is-localizable/is/localizable.rb,
lib/dm-is-localizable/storage/translation.rb

Defined Under Namespace

Modules: ClassMethods, InstanceMethods, Translation

Instance Method Summary collapse

Instance Method Details

#is_localizable(options = {}, &block) ⇒ Object 



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# File 'lib/dm-is-localizable/is/localizable.rb', line 12

def is_localizable(options = {}, &block)

  extend  ClassMethods
  include InstanceMethods

  options = {
    :as                       => nil,
    :model                    => "#{self}Translation",
    :accept_nested_attributes => true
  }.merge(options)

  remixer_fk = ActiveSupport::Inflector.foreign_key(self.name).to_sym
  remixer    = remixer_fk.to_s.gsub('_id', '').to_sym
  remixee    = ActiveSupport::Inflector.tableize(options[:model]).to_sym

  remix n, Translation, :as => options[:as], :model => options[:model]

  @translation_model = ActiveSupport::Inflector.constantize(options[:model])

  enhance :translation, @translation_model do

    property remixer_fk,   Integer, :min => 1, :required => true, :unique_index => :unique_languages
    property :language_id, Integer, :min => 1, :required => true, :unique_index => :unique_languages

    belongs_to remixer
    belongs_to :language

    class_eval &block

    validates_uniqueness_of :language_id, :scope => remixer_fk

  end

  has n, :languages, :through => remixee, :constraint => :destroy

  self.class_eval(<<-RUBY, __FILE__, __LINE__ + 1)

    alias :translations :#{remixee}

    if options[:accept_nested_attributes]

      # cannot accept_nested_attributes_for :translations
      # since this is no valid relationship name, only an alias

      accepts_nested_attributes_for :#{remixee}
      alias :translations_attributes :#{remixee}_attributes

    end

  RUBY

  localizable_properties.each do |property_name|
    self.class_eval(<<-RUBY, __FILE__, __LINE__ + 1)

      def #{property_name}(language_code)
        translate(:#{property_name.to_sym}, language_code)
      end

    RUBY
  end

end