ActionDispatch::Http::UploadedFile broken for Rails 3.2

[AaronLasseigne]

When #243 was merged we used eof? to check file filters. That method was not added to ActionDispatch::Http::UploadedFile until 4.0.2.

http://apidock.com/rails/v4.0.2/ActionDispatch/Http/UploadedFile/eof%3F

[AaronLasseigne]

Current workarounds include:

Go straight to the temp file:

file_filter_name: (file = params[:file]) && file.tempfile

Pass the upload as an object:

object :file_filter_name,
  class: ActionDispatch::Http::UploadedFile

[tfausak]

ActionDispatch's uploaded file only has a few methods in version 3.2.0:

• original_filename
• content_type
• tempfile
• headers
• read
• open
• path
• rewind
• size

Of those, #rewind seems like the most likely replacement for #eof?.