设计，让注册控制器接受图像？

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => { :method => :put, :multipart => true }) do |f| %>

<p><%= f.label :photo %><br />
<%= f.file_field :photo %></p>

Started POST \"/users\" for 127.0.0.1 at Tue Jun 14 13:00:27 -0700 2011
  Processing by Devise::RegistrationsController#update as HTML
  Parameters: {\"commit\"=>\"Update\", \"authenticity_token\"=>\"2beiFZYBwuUdTprM3QARML6SQlH9yz/oWzPqfdj1GdQ=\", \"utf8\"=>\"✓\", \"user\"=>{\"photo\"=>#<ActionDispatch::Http::UploadedFile:0x103126b60 @tempfile=#<File:/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/RackMultipart20110614-3154-l07lvd-0>, @original_filename=\"screenshot-3.png\", @headers=\"Content-Disposition: form-data; name=\\\"user[photo]\\\"; filename=\\\"screenshot-3.png\\\"\\r\\nContent-Type: image/png\\r\\n\", @content_type=\"image/png\">, \"password_confirmation\"=>\"[FILTERED]\", \"current_password\"=>\"[FILTERED]\", \"password\"=>\"[FILTERED]\", \"email\"=>\"name@gmail.com\"}}
  User Load (0.2ms)  SELECT \"users\".* FROM \"users\" WHERE \"users\".\"id\" = 1 LIMIT 1
  CACHE (0.0ms)  SELECT \"users\".* FROM \"users\" WHERE \"users\".\"id\" = 1 LIMIT 1
[paperclip] identify -format %wx%h \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-0.png[0]\' 2>/dev/null
[paperclip] convert \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-0.png[0]\' -resize \"300x300>\" \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-020110614-3154-zrpy05-0\' 2>/dev/null
[paperclip] identify -format %wx%h \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-0.png[0]\' 2>/dev/null
[paperclip] convert \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-0.png[0]\' -resize \"100x100>\" \'/var/folders/lF/lF0Ne5vGFj44kV54W3zBdU+++TI/-Tmp-/stream20110614-3154-1ozp24i-020110614-3154-10hkm68-0\' 2>/dev/null
Rendered devise/registrations/edit.html.erb within layouts/application (13.3ms)
Completed 200 OK in 385ms (Views: 17.9ms | ActiveRecord: 0.2ms)