# File lib/couchrest/mixins/extended_attachments.rb, line 6
      def create_attachment(args={})
        raise ArgumentError unless args[:file] && args[:name]
        return if has_attachment?(args[:name])
        self['_attachments'] ||= {}
        set_attachment_attr(args)
      rescue ArgumentError => e
        raise ArgumentError, 'You must specify :file and :name'
      end