ruby-on-rails – 存储在Rails会话中的对象变成了一个String？

为了重现我已经创建了一个示例Rails 4.1应用程序

$rails new session-test

添加了测试控制器：

class HomeController < ApplicationController
  def index
    logger.debug "session[:customer]: #{session[:customer]}"
    logger.debug "session[:customer].name: #{session[:customer].name}"
  end

  def from
    Struct.new 'Customer',:name,:address
    session[:customer] = Struct::Customer.new 'Dave','123 Main'
    redirect_to :action => :index
  end
end

设置路线：

Rails.application.routes.draw do
  get 'home/index'
  get 'home/from'
  root 'home#index'
end

然后我启动Rails

$bundle exec rails server

并在浏览器中点击localhost：3000 / home /：

Started GET "/home/from" for 127.0.0.1 at 2014-04-09 21:20:25 -0700
Processing by HomeController#from as HTML
Redirected to http://localhost:3000/home/index
Completed 302 Found in 18ms (ActiveRecord: 0.0ms)


Started GET "/home/index" for 127.0.0.1 at 2014-04-09 21:20:25 -0700
Processing by HomeController#index as HTML
session[:customer]: #<struct Struct::Customer name="Dave",address="123 Main">
Completed 500 Internal Server Error in 2ms

NoMethodError (undefined method `name' for "#<struct Struct::Customer name="Dave",address="123 Main">":String):
  app/controllers/home_controller.rb:4:in `index'

我不知道为什么这个对象被翻译为String …

它似乎与cookie_store的会话存储类型有关,因为如果我改变了

session_store.rb来自

Rails.application.config.session_store：cookie_store,key：’_ session-test_session’

至

Rails.application.config.session_store：cache_store

有用！

有任何想法吗？