- view
<% form_tag({:action => 'update', :id => @memo}, :multipart=> true) do %> <p><label for="memo_image1"><b>image1</b></label><br/> <%= file_field :memo, :image1 %> <%= submit_tag 'Edit' %> <% end %>
- controller
uploaded = params[:memo][:image1] filepath = 'public/images/' + uploaded.original_filename File.open(filepath, 'w') {|f| f.write(uploaded.read) }