ruby-on-rails - (Ubuntu)当我运行 "rails server"时它运行，但随后退出并给了我一堆我认为是错误消息

Question

我对 Ubuntu 和编程以及使用终端相当陌生，在搜索了很长一段时间后，我找不到任何关于我的问题的信息，或者我想不出要准确搜索什么，所以我认为发布我自己的问题会有所帮助因为我看到其他人遇到的大多数错误要短得多并且是不同的，即使它们都以相同的方式开始，rails 服务器运行一两秒钟然后退出，然后输出错误。任何帮助表示赞赏。

我运行的代码:

root@KyleBuntu:~/Desktop/Rails/first_app# rails server
>=> Booting WEBrick
>=> Rails 4.0.8 application starting in development on http://0.0.0.0:3000
>=> Run `rails server -h` for more startup options
>=> Ctrl-C to shutdown server
>Exiting
>/home/verendus/Desktop/Rails/first_app/config/environments/development.rb:1:in `<top (required)>': undefined method `configure' for #<FirstApp::Application:0x00000002e01dc8> (NoMethodError)
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `block in require'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:214:in `load_dependency'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:590:in `each'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:590:in `block in <class:Engine>'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `instance_exec'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `run'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:55:in `block in run_initializers'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `each'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `tsort_each_child'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:180:in `each'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
>   from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:54:in `run_initializers'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/application.rb:215:in `initialize!'
>   from /home/verendus/Desktop/Rails/first_app/config/environment.rb:5:in `<top (required)>'
>   from /home/verendus/Desktop/Rails/first_app/config.ru:3:in `require'
>   from /home/verendus/Desktop/Rails/first_app/config.ru:3:in `block in <main>'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
>   from /home/verendus/Desktop/Rails/first_app/config.ru:in `new'
>   from /home/verendus/Desktop/Rails/first_app/config.ru:in `<main>'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands/server.rb:48:in `app'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands/server.rb:75:in `start'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:76:in `block in <top (required)>'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:71:in `tap'
>   from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:71:in `<top (required)>'
>   from bin/rails:8:in `require'
>   from bin/rails:8:in `<main>'

如果需要任何信息，那么我可以提供。我对 Ubuntu 和编程都是新手，如果我在某处犯了一些简单的错误，我很抱歉。任何帮助深表感谢。

根据要求配置:

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
  config.action_controller.perform_caching = false

  # 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

  # 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

第二次尝试:

=> Booting WEBrick
=> Rails 4.0.8 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/home/verendus/Desktop/Rails/first_app/config/environments/development.rb:1:in `<top (required)>': undefined method `application' for FirstApp:Module (NoMethodError)
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `block in require'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:214:in `load_dependency'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:590:in `each'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/engine.rb:590:in `block in <class:Engine>'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `instance_exec'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `run'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `each'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `tsort_each_child'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:180:in `each'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
    from /home/verendus/.rvm/rubies/ruby-2.0.0-p481/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/initializable.rb:54:in `run_initializers'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/application.rb:215:in `initialize!'
    from /home/verendus/Desktop/Rails/first_app/config/environment.rb:5:in `<top (required)>'
    from /home/verendus/Desktop/Rails/first_app/config.ru:3:in `require'
    from /home/verendus/Desktop/Rails/first_app/config.ru:3:in `block in <main>'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
    from /home/verendus/Desktop/Rails/first_app/config.ru:in `new'
    from /home/verendus/Desktop/Rails/first_app/config.ru:in `<main>'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands/server.rb:48:in `app'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands/server.rb:75:in `start'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:76:in `block in <top (required)>'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:71:in `tap'
    from /home/verendus/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.0.8/lib/rails/commands.rb:71:in `<top (required)>'
    from bin/rails:8:in `require'
    from bin/rails:8:in `<main>'

Answer 1

你只需要你的第一行说:

FirstApp.application.configure do