无法启动Ruby服务器，下面的书“Beginning Rails 4”

Question

我在本书中一直遵循下面的指导（并且我确保我将所有内容都正确地复制了）。我正在做的例子是通过首先生成一个控制器，创建一个动作，然后创建一个模板来制作一个简单的应用程序。这只是一个简单的“你好世界”的例子。

问题：当我在终端中输入“rails server”（在应用程序文件夹中时）时，我收到了一堆东西，但它始于未定义的方法错误。我发布的东西如下：

admins-MacBook-Pro:hello alexcrisan$ rails server 
=> Booting Puma 
=> Rails 5.0.0.1 application starting in development on http://localhost:3000 
=> Run `rails server -h` for more startup options 
Exiting 
/Users/alexcrisan/Documents/Beginning Rails 4/hello/config/routes.rb:2:in `block in <top (required)>': undefined method `  get' for #<ActionDispatch::Routing::Mapper:0x007fe383be0a00> (NoMethodError) 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:389:in `instance_exec' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:389:in `eval_block' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/actionpack-5.0.0.1/lib/action_dispatch/routing/route_set.rb:371:in `draw' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config/routes.rb:1:in `<top (required)>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `block in load' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:259:in `load_dependency' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:40:in `block in load_paths' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:40:in `each' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:40:in `load_paths' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:16:in `reload!' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:26:in `block in updater' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/activesupport-5.0.0.1/lib/active_support/file_update_checker.rb:77:in `execute' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:27:in `updater' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application/finisher.rb:119:in `block in <module:Finisher>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `instance_exec' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `run' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/initializable.rb:55:in `block in run_initializers' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `call' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each' 
    from /Users/alexcrisan/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/initializable.rb:54:in `run_initializers' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/application.rb:352:in `initialize!' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config/environment.rb:5:in `<top (required)>' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config.ru:3:in `require_relative' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config.ru:3:in `block in <main>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/builder.rb:55:in `instance_eval' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/builder.rb:55:in `initialize' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config.ru:in `new' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/config.ru:in `<main>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/builder.rb:49:in `eval' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/builder.rb:49:in `new_from_string' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/builder.rb:40:in `parse_file' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/server.rb:318:in `build_app_and_options_from_config' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/server.rb:218:in `app' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/server.rb:59:in `app' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/rack-2.0.1/lib/rack/server.rb:353:in `wrapped_app' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/server.rb:124:in `log_to_stdout' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/server.rb:77:in `start' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:90:in `block in server' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3@global/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/bin/rails:9:in `require' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/bin/rails:9:in `<top (required)>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/client.rb:30:in `run' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/bin/spring:49:in `<top (required)>' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load' 
    from /Users/alexcrisan/.rvm/gems/ruby-2.3.3/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/bin/spring:14:in `require' 
    from /Users/alexcrisan/Documents/Beginning Rails 4/hello/bin/spring:14:in `<top (required)>' 
    from bin/rails:3:in `load' 
    from bin/rails:3:in `<main>' 

我不知道为什么它这样做，所以任何帮助表示赞赏！

感谢

Answer 1

错误说未定义的方法'得到”了。 这是由于“获得”之前的额外空间。删除它们，我认为你应该很好去。