Rails 3控制台引发错误

我正在将Rails 2.3.8应用程序升级到Rails 3.0.17，并在mac osx Lion环境中使用RVM（Ruby 1.9.3）。（已经在使用捆绑器）。Rails 3控制台引发错误

我的应用程序工作正常，但轨道控制台给我的错误：（在任何DB调用）

User.first 
NoMethodError: You have a nil object when you didn't expect it! 
You might have expected an instance of Array. 
The error occurred while evaluating nil.[] 
    from /Users/franklin/rails_apps/myapp/app/models/user.rb:84:in `<class:User>' 
    from /Users/franklin/rails_apps/myapp/app/models/user.rb:1:in `<top (required)>' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:458:in `load' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:458:in `block in load_file' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:597:in `new_constants_in' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:457:in `load_file' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:344:in `require_or_load' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:491:in `load_missing_constant' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:183:in `block in const_missing' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:181:in `each' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.0.17/lib/active_support/dependencies.rb:181:in `const_missing' 
    from (irb):7 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.17/lib/rails/commands/console.rb:44:in `start' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.17/lib/rails/commands/console.rb:8:in `start' 
    from /Users/franklin/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.0.17/lib/rails/commands.rb:23:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>'

请帮助。

来源

2012-10-11 Valadares

堆栈跟踪清楚地表明您在user.rb中存在第84行的问题 – UncleGene

仅在少数模型调用中发生。 – Valadares

谢谢UncleGene。这次升级对我来说，我只是盲目的麻烦。 – Valadares

修正用户模型上的Paperclip配置后，一切工作正常。感谢您的建议。

来源

2012-10-11 22:10:41 Valadares

Rails 3控制台引发错误

回答

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