class Ransack::Helpers::FormHelper::SortLink

def parse_sort(field)
  attr_name, new_dir = field.to_s.split(/\s+/)
  if no_sort_direction_specified?(new_dir)
    new_dir = detect_previous_sort_direction_and_invert_it(attr_name)
  end
  "#{attr_name} #{new_dir}"
end