Uploadify with active record sessions store in Rails 3

session_store.rb

#
# 这只是针对active_record_store情况下要做的修改，完整的cookie_store mode看这里
# https://github.com/websymphony/Rails3-Paperclip-Uploadify
#

Uploader::Application.config.session_store :active_record_store, :key => '_uploader_session'

Rails.application.config.middleware.insert_before(
  Rails.application.config.session_store,
  FlashSessionCookieMiddleware,
  Rails.application.config.session_options[:key]
)