向AWS部署rails应用程序 - 无：NilClass错误

我试图首次使用橡皮部署到我的AWS EC2。为了测试我现在只使用t1.micro。向AWS部署rails应用程序 - 无：NilClass错误

我与橡胶一个奇怪的错误TCAP橡胶后已经编辑rubber.yml后：create_staging

这是消息：

/Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:1:in `expand_string': undefined method `known_roles' for nil:NilClass (NoMethodError) 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:168:in `eval' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:168:in `expand_string' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:180:in `expand' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:146:in `[]' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/environment.rb:230:in `method_missing' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/rubber-2.5.5/lib/rubber/recipes/rubber/utils.rb:22:in `block (2 levels) in load' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `each' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:34:in `execute!' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:14:in `execute' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/gems/capistrano-2.15.5/bin/cap:4:in `<top (required)>' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/bin/cap:23:in `load' 
    from /Users/mgreschke/Dropbox/medisupply/vendor/bundle/bin/cap:23:in `<main>'

任何想法，寻找一个错误？这似乎是一个简单的问题给我，但我真的没有一个线索在哪里看..

最佳，中号

来源

2013-10-20 mgreschke

在您的整个应用程序中寻找关键字“known_roles”（可能位于您的'environment.rb'中）调用此方法的对象返回为零。如果您可以发布更多关于调用哪个对象的详细信息，它将对调试更有帮助。 –

你已经解决了这个问题吗？发布解决方案会很有帮助。 –

谢尔盖，你的帖子下面和链接帮助解决问题。谢谢！ – mgreschke

只是删除rubber_env。

staging_roles: "#{known_roles.reject {|r| r =~ /slave/ || r =~ /^db$/ }.join(',')}" 
# instead of 
staging_roles: "#{rubber_env.known_roles.reject {|r| r =~ /slave/ || r =~ /^db$/ }.join(',')}"

有这种简单的解决https://github.com/rubber/rubber/pull/406/files。

来源

2013-10-29 19:37:48

谢谢谢尔盖。这解决了解决为'complete_unicorn_nginx_postgresql'模板创建的应用程序的问题 –

向AWS部署rails应用程序 - 无：NilClass错误

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