Error Empty file upload result - problem with jQuery bulk file upload

I have problems with multiple file upload. I tried Paperclip with jQuery
file uplad plugin and get the error mentioned in the title. Files get
uploaded without problems, but I keep getting this embarrassing error.

Can somebody offer a solution to my problem or suggest alternative
solution
that can be implemented in 2 hours? My client is getting a bit uneasy
now.

I have tried everything I could think of and in the end I have modified
the
model following this advice:
https://github.com/blueimp/jQuery-File-Upload/issues/365#issuecomment-13859210

My code can be found at:
https://github.com/bigos/chrisb-images/blob/master/app/models/upload.rb

relevant bit in my model looks like this:

def to_jq_upload
{
:files => [
{
:name => upload_file_name,
:type => upload_content_type,
:size => upload_file_size,
:url => upload.url,
:delete_url => upload_path(self),
:delete_type => “DELETE”
}
]
}
end

On Thursday, 28 March 2013 19:03:48 UTC, Bigos wrote:

I have problems with multiple file upload. I tried Paperclip with jQuery
file uplad plugin and get the error mentioned in the title. Files get
uploaded without problems, but I keep getting this embarrassing error…

Fixed!!!
controller:
https://github.com/bigos/chrisb-images/blob/master/app/controllers/photos_controller.rb

def create
@photo = Photo.new(params[:photo])

respond_to do |format|
  if @photo.save
    format.html { render :json => [@photo.to_jq_upload].to_json,
      :content_type => 'text/html',
      :layout => false
    }
    format.json { render json: {files: [@photo.to_jq_upload] }}
  else
    format.html { render action: "new" }
    format.json { render json: @photo.errors, status: 

:unprocessable_entity }
end
end
end

model:
https://github.com/bigos/chrisb-images/blob/master/app/models/photo.rb

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