Upload error

gistfile1.rb

Started POST "/upload" for 127.0.0.1 at 2012-03-09 16:37:43 +0100
RailsDevTweaks: Skipping ActionDispatch::Reloader hooks for this request.
Processing by UploadsController#upload as JSON
  Parameters: {"files"=>[#<ActionDispatch::Http::UploadedFile:0x0000012f189e28 @original_filename="P3040167.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"files[]\"; filename=\"P3040167.JPG\"\r\nContent-Type: image/jpeg\r\n", @tempfile=#<File:/var/folders/cx/vtstdwkd37g97t2r24zkyrkr0000gn/T/RackMultipart20120309-28216-4jckcv>>, #<ActionDispatch::Http::UploadedFile:0x0000012f189d60 @original_filename="P3040170.JPG", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"files[]\"; filename=\"P3040170.JPG\"\r\nContent-Type: image/jpeg\r\n", @tempfile=#<File:/var/folders/cx/vtstdwkd37g97t2r24zkyrkr0000gn/T/RackMultipart20120309-28216-14zq9wc>>]}
Completed 500 Internal Server Error in 177ms

NoMethodError (undefined method `path' for #<Upload:0x0000012f15c450>):
  app/controllers/uploads_controller.rb:9:in `block in upload'
  app/controllers/uploads_controller.rb:6:in `each'
  app/controllers/uploads_controller.rb:6:in `upload'


  Rendered /Users/jesper/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_trace.erb (4.5ms)
  Rendered /Users/jesper/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.9ms)
  Rendered /Users/jesper/.rvm/gems/ruby-1.9.2-p180/gems/actionpack-3.2.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (21.1ms)