非常感谢楼上所有人的帮助和指导。我会加紧学习的.感谢你们抽出宝贵的时间。谢谢！

#27 楼 @springwq 好的我升级一下版本。有点郁闷.版本影响这么大。非常感谢指导

#24 楼 @springwq 尴尬了..改了 users_helper 后确实顺利跑起来了. 我开始学习时候是想着基础太薄弱，习题先空着，照着教程先做第一遍，有个印象，利于第二遍再细致的学习通篇教程，顺带做所有习题。问题竟然是出在这里. 按照你所说我报错信息没有给全，比较奇怪的是，为什么我的机器上显示不出来呢？ argumenterror 这一段我的机器上完全没有显示呢，好奇怪啊

#21 楼 @chenge OK.wo shishi

#16 楼 @chenge ~ ruby -v ruby 2.0.0p643 (2015-02-25 revision 49749) [x86_64-darwin14.1.0]

#16 楼 @chenge 版本为 ruby 2.0.0p643

#10 楼 @springwq 感谢你的回复，检查过几遍了，和作者的代码没有任何差别，我把项目上传到了 github 上，这是链接https://github.com/58383788/sample_app.git

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports and disable caching.
  config.consider_all_requests_local       = true

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
  # yet still be able to expire them through the digest params.
  config.assets.digest = true

  # Adds additional error checking when serving assets at runtime.
  # Checks for improperly declared sprockets dependencies.
  # Raises helpful error messages.
  config.assets.raise_runtime_errors = true

  # Raises error for missing translations
  # config.action_view.raise_on_missing_translations = true
end

#11 楼 @chenge 抱歉，基础太差了。满脑子雾水.很感谢你的耐心和提醒，我把 Log 删掉了. 我观察了一下 development.rb.你叫我修改的地方其实正是打开的。我补充一些环境和配置的基础吧. 谢谢，确实麻烦了，太新手见笑了

#4 楼 @chenge 呃？能具体一点吗。我不是很懂，要怎样改正呢？

#1 楼 @michael0015 是 Log 中的信息吗？