Ruby on rails 运行“rails生成rspec:install”时出现未定义的方法错误

我正在阅读MichaelHartl教程的第3章，并尝试运行rails generate rspec:install，得到下面的错误消息

C:\Sites\sample_app>rails generate rspec:install
DL is deprecated, please use Fiddle
C:/Sites/sample_app/config/environments/development.rb:1:in `<top (required)>':
undefined method `configure' for #<SampleApp::Application:0x380cda8> (NoMethodEr
ror)
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-
4.0.8/lib/active_support/dependencies.rb:229:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-
4.0.8/lib/active_support/dependencies.rb:229:in `block in require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-
4.0.8/lib/active_support/dependencies.rb:214:in `load_dependency'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/activesupport-
4.0.8/lib/active_support/dependencies.rb:229:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/engine.rb:590:in `each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/engine.rb:590:in `block in <class:Engine>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:30:in `instance_exec'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:30:in `run'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:55:in `block in run_initializers'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:150:in `block i
n tsort_each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:183:in `block (
2 levels) in each_strongly_connected_component'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:210:in `block (
2 levels) in each_strongly_connected_component_from'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:219:in `each_st
rongly_connected_component_from'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:209:in `block i
n each_strongly_connected_component_from'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:44:in `each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:44:in `tsort_each_child'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:203:in `each_st
rongly_connected_component_from'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:182:in `block i
n each_strongly_connected_component'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each_st
rongly_connected_component'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_e
ach'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/initializable.rb:54:in `run_initializers'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/application.rb:215:in `initialize!'
        from C:/Sites/sample_app/config/environment.rb:5:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/application.rb:189:in `require'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/application.rb:189:in `require_environment!'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/railties-4.0.8
/lib/rails/commands.rb:44:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'

我的config/enivronments/development.rb文件的第一行

Rails.application.configure do

我找到了这个问题的其他答案。他们建议将my development.rb文件的第一行更改为SampleApp:Application.configure.do；但这只会导致另一个错误“单位化常量样本应用”。所以我把它改回默认值

编辑：已将其修复为SampleApp:：Application，在运行rails generate rspec:install后收到此cmd行消息

C:\Sites\sample_app>rails generate rspec:install
DL is deprecated, please use Fiddle
      create  .rspec
      create  spec
      create  spec/spec_helper.rb

---

谢谢，好的，把第一行改成

SampleApp::Application.configure do

看来你错过了双人间

---

归功于此。

谢谢，好的，将第一行更改为

SampleApp::Application.configure do

看来你错过了双人间

---

这是我的功劳。

对不起，我的问题确实犯了一个错误。我尝试了rails generate:install，但我遇到了上面的错误抱歉，我的问题中确实犯了一个错误。我尝试了rails generate:install，但我遇到了上面的错误。你能发布development.rb文件的第一行吗？在app/config/environments/development.rb中。另外，当你运行新的rails时。。。generator命令，你给你的应用命名了什么..SampleApp？？？谢谢，确定将第一行更改为SampleApp:：Application.configure do。看来你错过了双人间。如果这不起作用，我还有一个建议可以解决它。嗨，这可能就是诀窍。你能看看我上面的新命令行消息并告诉我它是否工作正常吗？是的，这创建了使用Rspec所需的文件。更新了我下面的答案。谢谢。我需要担心DL不推荐使用吗？改用fiddle？你能发布development.rb文件的第一行吗？在app/config/environments/development.rb中。另外，当你运行新的rails时。。。generator命令，你给你的应用命名了什么..SampleApp？？？谢谢，确定将第一行更改为SampleApp:：Application.configure do。看来你错过了双人间。如果这不起作用，我还有一个建议可以解决它。嗨，这可能就是诀窍。你能看看我上面的新命令行消息并告诉我它是否工作正常吗？是的，这创建了使用Rspec所需的文件。更新了我下面的答案。谢谢。我是否需要担心DL已被弃用，请改用fiddle？