Module: HasTranslations::ModelAdditions::ClassMethods

Defined in:
lib/has_translations/model_additions.rb

Instance Method Summary collapse

Instance Method Details

#has_translations(*attrs) ⇒ Object 



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# File 'lib/has_translations/model_additions.rb', line 10

def has_translations(*attrs)
  new_options = attrs.extract_options!
  options = {
    fallback: false,
    reader: true,
    writer: false,
    nil: '',
    autosave: new_options[:writer],
    translation_class: nil
  }.merge(new_options)

  translation_class_name = options[:translation_class].try(:name) || "#{self.model_name}Translation"
  options[:translation_class] ||= translation_class_name.constantize

  options.assert_valid_keys(
    [
      :fallback,
      :reader,
      :writer,
      :nil,
      :inverse_of,
      :autosave,
      :translation_class,
      :foreign_key
    ]
  )

  belongs_to = self.model_name.to_s.demodulize.underscore.to_sym

  class_attribute :has_translations_options
  self.has_translations_options = options

  # associations, validations and scope definitions
  options[:translation_class].belongs_to(belongs_to, foreign_key: options[:foreign_key])
  has_many(
    :translations,
    class_name: translation_class_name,
    dependent: :destroy,
    autosave: options[:autosave],
    inverse_of: options[:inverse_of],
    foreign_key: options[:foreign_key]
  )
  options[:translation_class].validates(
    :locale,
    presence: true,
    uniqueness: {scope: (options[:foreign_key] || "#{belongs_to}_id").to_sym}
  )

  # Optionals delegated readers
  if options[:reader]
    attrs.each do |name|
      send :define_method, name do |*args|
        locale = args.first || I18n.locale
        translation = self.translation(locale)
        translation.try(name) || has_translations_options[:nil]
      end
    end
  end

  # Optionals delegated writers
  if options[:writer]
    attrs.each do |name|
      send :define_method, "#{name}_before_type_cast" do
        translation = self.translation(I18n.locale, false)
        translation.try(name)
      end

      send :define_method, "#{name}=" do |value|
        translation = find_or_build_translation(I18n.locale)
        translation.send(:"#{name}=", value)
      end
    end
  end
end

#translated(locale) ⇒ Object 



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# File 'lib/has_translations/model_additions.rb', line 6

def translated(locale)
  where("#{self.has_translations_options[:translation_class].table_name}.locale = ?", locale).joins(:translations)
end