Hi, I am attempting to replace an exiting photo with a new one uploaded by the user. I am using attachment_fu and I am coming up with the following exception: can''t convert nil into String /vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/backends/file_system_backend.rb:23:in `join'' /vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/backends/file_system_backend.rb:23:in `full_filename'' /vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu.rb:369:in `temp_paths'' /vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu.rb:354:in `uploaded_data='' My ruby code: <% form_for(@photo) do |f| %> <%= f.error_messages %> <%= image_tag(@photo.public_filename, :BORDER=>0) %> <p> <label for="upload">Upload new photo:</label> <%= f.file_field :uploaded_data %> <%= f.submit ''Update'' %> </p> <% end %> My rails code: def edit @photo = Photo.find(params[:id]) end def update @photo = Photo.find(params[:id]) if @photo.update_attributes(params[:photo]) flash[:notice] = ''Photo was successfully updated.'' redirect_to(''/listingHome/active/edit/'' + @photo.lisitng_id) end end Method failing in attachement_fu # Gets the full path to the filename in this format: # # # This assumes a model name like MyModel # # public/#{table_name} is the default filesystem path # RAILS_ROOT/public/my_models/5/blah.jpg # # Overwrite this method in your model to customize the filename. # The optional thumbnail argument will output the thumbnail''s filename. def full_filename(thumbnail = nil) file_system_path = (thumbnail ? thumbnail_class : self).attachment_options[:path_prefix].to_s File.join(RAILS_ROOT, file_system_path, *partitioned_path(thumbnail_name_for(thumbnail))) end Anybody have an idea what I am doing wrong? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.