Rails - Mar 2006 - Multiple file uploads

I have a form with multiple file upload fields (1-10), of which 2-10  
are optional. So i need to cycle thru all file fields and pick only  
those that have a file attached. Selecting only one file in the form,  
the paramters look simple:
"image"=>{"file_1"=>#<File:/tmp/CGI344.4>,
"file_2"=>"", "file_3"=>""}, so  I
tried this:

params[:image].each_value do |incomming_file|
   unless incoming_file.empty?
		#do file processing
   end
end

However, this is still causing the empty fields (file_2, file_3 etc)  
to be processed, which raises all sorts of errors as the File.methods  
are not available of course. I tried .nil? and various other tests  
but i simply can''t get it to skip those empty file fields. any ideas?  
Thank you.

sebastian
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Am Mittwoch, den 22.03.2006, 19:20 -0600 schrieb Sebastian
Friedrich:
> I have a form with multiple file upload fields (1-10), of which 2-10
> are optional. So i need to cycle thru all file fields and pick only
> those that have a file attached. Selecting only one file in the form,
> the paramters look simple:
"image"=>{"file_1"=>#<File:/tmp/CGI344.4>,
> "file_2"=>"", "file_3"=>""},
so  I tried this:
> 
> 
> params[:image].each_value do |incomming_file| 
>   unless incoming_file.empty?
> #do file processing
>   end
> end
> 
> 
> However, this is still causing the empty fields (file_2, file_3 etc)
> to be processed, which raises all sorts of errors as the File.methods
> are not available of course. I tried .nil? and various other tests but
> i simply can''t get it to skip those empty file fields. any ideas?
> Thank you.
Did you examine the class of the empty parameters? Is it File or
StringIO? If yes, you could simply test incoming_file.eof? .
-- 
Norman Timmler

http://blog.inlet-media.de