tim-vandecasteele/grape-swagger — pull request #48 by timgluz (2013-07-01 12:29:59+00:00)
Title: solution for issue #47

Rails seems to use `Hash` as file-class and not 'Rack::Multipart::UploadedFile' ;
I added new list with supported fileclasses, it simplifies current if-sentence and adding new file-classes in future.