# File lib/padrino-contrib/orm/active_record/permalink_i18n.rb, line 18
            def has_i18n_permalink(field, options={})
              include InstanceMethods
              @@_i18n_permalink_field = field
              @@_i18n_permalink_langs = options.delete(:langs)
              before_save :generate_i18n_permalinks
              i18n_permalink_langs.each do |lang|
                validates_uniqueness_of "#{field}_#{lang}""#{field}_#{lang}", options
              end
            end