我一直在按照本书中的说明进行操作（我确保将所有内容复制正确）。我正在开发的示例是通过首先生成控制器，创建操作，然后创建模板来创建简单的应用程序。这只是一个简单的'＃hello world＆＃34;例。
问题：当我进入＆＃34; rails server＆＃34; （在app文件夹中）在我的终端中，我得到了很多东西，但它开始时出现了一个未定义的方法错误。我发布以下内容：
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>'
我不确定为什么要这样做，所以任何帮助都表示赞赏！
由于
答案 0 :(得分：0)
错误表示未定义的方法`get'。 这是因为'get'之前有额外的空格。删除它们，我认为你应该好好去。