module DataMapper class Property class ParseFile < Object def dump(value) value end def load(value) value end def typecast(value) if value.respond_to?(:original_filename) && value.respond_to?(:read) && value.respond_to?(:content_type) adapter = model.repository.adapter filename = value.original_filename content = value.read content_type = value.content_type adapter.upload_file(filename, content, content_type).merge("__type" => "File") else value end end end end end