module Traco module ClassMethods LOCALE_RE = /[a-zA-Z]{2}(?:_[a-zA-Z]{2})?/ def locales_for_attribute(attribute) re = /\A#{attribute}_(#{LOCALE_RE})\z/ column_names. grep(re) { $1.to_sym }. sort_by(&locale_sort_value) end def locale_columns(*attributes) attributes.inject([]) { |memo, attribute| memo += locales_for_attribute(attribute).map { |locale| :"#{attribute}_#{locale}" } } end def current_locale_column(attribute) :"#{attribute}_#{I18n.locale.to_s.downcase.sub("-", "_")}" end def human_attribute_name(attribute, options = {}) default = super(attribute, options.merge(default: "")) if default.blank? && attribute.to_s.match(/\A(\w+?)_(#{LOCALE_RE})\z/) column, locale = $1, $2.to_sym if translates?(column) return "#{super(column, options)} (#{locale_name(locale)})" end end super end private def locale_sort_value lambda { |locale| if locale == Traco.locale_suffix(I18n.default_locale) # Sort the default locale first. "0" else # Sort the rest alphabetically. locale.to_s end } end def translates?(attribute) translatable_attributes.include?(attribute.to_sym) end def locale_name(locale) default = locale.to_s.upcase.sub("_", "-") I18n.t(locale, scope: :"i18n.languages", default: default) end end end