class ActionDispatch::Routing::Mapper::Scope

def action_name(name_prefix, prefix, collection_name, member_name)
  case scope_level
  when :nested
    [name_prefix, prefix]
  when :collection
    [prefix, name_prefix, collection_name]
  when :new
    [prefix, :new, name_prefix, member_name]
  when :member
    [prefix, name_prefix, member_name]
  when :root
    [name_prefix, collection_name, prefix]
  else
    [name_prefix, member_name, prefix]
  end
end