Ruby on rails 执行'时出现名称错误；轨道s'；

我为Rails开始了本教程。我刚刚创建了应用程序，打算测试默认的欢迎页面，结果如下：

D:\Programming\Rails Projects\simpleCMS>rails server
    C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.3/lib/action_view/helpers.rb:40:in `<module:Helpers>': uninitialized constant ActionView::Helpers::ActiveModelHelper (NameError)
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.3/lib/action_view/helpers.rb:4:in `<module:ActionView>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.3/lib/action_view/helpers.rb:3:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.3/lib/action_view/base.rb:5:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.3/lib/action_view/base.rb:5:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web_console/template.rb:7:in `<class:Template>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web_console/template.rb:6:in `<module:WebConsole>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web_console/template.rb:1:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web_console.rb:12:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web_console.rb:12:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web-console.rb:1:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/web-console-2.2.1/lib/web-console.rb:1:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
            from D:/Programming/Rails Projects/simpleCMS/config/application.rb:7:in `<top (required)>'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:78:in `require'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:78:in `block in server'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:75:in `tap'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:75:in `server'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
            from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands.rb:17:in `<top (required)>'
            from bin/rails:4:in `require'
            from bin/rails:4:in `<main>'

---

您可能需要绑定一个ip地址 你为什么不试试这个呢：

---

rails服务器-b localhost卸载

railties

gem，因为仅仅卸载

rails

gem是不起作用的。然后安装一个较旧版本的

rails

gem（在我的例子中是4.0.0，因为那是tutotial提供的）

---

这解决了问题。

在

config/application.rb

的第7行有什么？

Bundler.require（*Rails.groups）

尝试注释该行，使其不会运行，并添加以下行：

Bundler.require（：default，Rails.env）

。不确定它是否能工作，但我对你的语法听起来不是很熟悉……与之前的@RubyRacer完全相同。至于语法，我甚至还没来得及编辑哪怕一行代码，所以这就是Rails自己所做的。正如我所说的，我不确定。在尝试运行服务器之前，您是否运行了

bundle install

？您应该详细解释解决方案。我假设他已经执行了db:migrate&db:seed，因此他执行了rails server；我在网上参加了一个saas课程，但我记得，有时根据你运行应用程序的位置，你可能需要添加“-B127.0.0.1”（即本地主机），但是如果你使用cloud9或nitrous，那么它会有所不同，但仍然是-b###（一些ip地址）。够清楚吗？

source 'https://rubygems.org'
gem 'rails', '4.2.3'
gem 'mysql2'
gem 'jbuilder', '~> 2.0'
gem 'sdoc', '~> 0.4.0', group: :doc
group :development, :test do
    gem 'byebug'
    gem 'web-console', '~> 2.0'
end
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]