将我的应用程序升级到 Rails 3.1.1 时出现 NameError

Question

我的应用程序的名称是 newsample_app 。我正在按照 Railstutorial 截屏视频升级到 Rails 3.1。以下是将文件从旧的“sample_app”复制到“newsample_app”并尝试运行 rspec 时收到的错误消息：

rspec 规范/控制器/pages_controller_spec.rb /Users/topica/rails_projects/newsample_app/config/routes.rb:1:in `': 未初始化的常量 NewSampleApp (NameError)

看到这个后，我将我的原始sample_app中的routes.rb文件从“SampleApp::Application.routes”更改为.draw do”对此：“NewSampleApp::Application.routes.draw do”但仍然收到错误。有什么想法吗？

仅供参考完整错误：

Topicas-MacBook-Pro:newsample_app topica$ rspec spec/controllers/pages_controller_spec.rb
/Users/topica/rails_projects/newsample_app/config/routes.rb:1:in `<top (required)>': uninitialized constant NewSampleApp (NameError)
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/routes_reloader.rb:29:in `block in load_paths'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/routes_reloader.rb:29:in `each'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/routes_reloader.rb:29:in `load_paths'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/routes_reloader.rb:13:in `reload!'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/routes_reloader.rb:7:in `block in initialize'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/activesupport-3.1.1/lib/active_support/file_update_checker.rb:32:in `call'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/activesupport-3.1.1/lib/active_support/file_update_checker.rb:32:in `execute_if_updated'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/finisher.rb:63:in `block (2 levels) in <module:Finisher>'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/finisher.rb:64:in `call'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application/finisher.rb:64:in `block in <module:Finisher>'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `each'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `run_initializers'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/application.rb:96:in `initialize!'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
    from /Users/topica/rails_projects/newsample_app/config/environment.rb:5:in `<top (required)>'
    from /Users/topica/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/topica/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/topica/rails_projects/newsample_app/spec/spec_helper.rb:3:in `<top (required)>'
    from /Users/topica/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/topica/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/topica/rails_projects/newsample_app/spec/controllers/pages_controller_spec.rb:1:in `<top (required)>'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `block in load_spec_files'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `map'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18:in `run'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
    from /Users/topica/.rvm/gems/ruby-1.9.2-p290@rails3_1tutorial/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `block in autorun'

Answer 1

您可能希望它与 config/application.rb 中的内容相同
如果它确实是 newsample_app ，那么它可能是 NewsampleApp 而不是 NewSampleApp

Answer 2

看来是案例问题。

> "newsample_app".camelize
 => "NewsampleApp" 

注意小写的“s”。