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我試圖按照關於在rails中註釋模型的一些在線教程。但是，似乎所有的教程都在討論過時的註釋版本或者不正確的安裝。如何在Rails版本3.2.1中註釋rails模型
到目前爲止，香港專業教育學院嘗試了以下
1）中的Gemfile
gem 'annotate', '2.4.0'
2）然後命令添加此：
bundle install
3）然後我看到，標註寶石被安裝並顯示在命令上
bundle show
4）最後以註釋我的模型中使用的命令
bundle exec annotate --position before
在這一點上，我希望我的模型，然而註釋什麼，我得到的是以下錯誤消息：
/Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/railties/databases.rake:4:in `<top (required)>': undefined method `namespace' for main:Object (NoMethodError)
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/railtie.rb:33:in `load'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/railtie.rb:33:in `block in <class:Railtie>'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/railtie.rb:184:in `instance_exec'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/railtie.rb:184:in `block in load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/railtie.rb:184:in `each'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/railtie.rb:184:in `load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/engine.rb:423:in `block in load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/application/railties.rb:8:in `each'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/application/railties.rb:8:in `all'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/engine.rb:423:in `load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/application.rb:145:in `load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
from Rakefile:7:in `<top (required)>'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/annotate-2.4.0/lib/annotate.rb:17:in `load'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/annotate-2.4.0/lib/annotate.rb:17:in `load_tasks'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/annotate-2.4.0/bin/annotate:66:in `<top (required)>'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/bin/annotate:19:in `load'
from /Users/AM/.rvm/gems/ruby-1.9.2-p290/bin/annotate:19:in `<main>'
所以感覺徹底難倒了。
關於如何進行的任何想法？
謝謝
嗯，沒有工作，得到消息「無法找到寶石'註釋（=2.4.1.β）紅寶石'在您的Gemfile中列出的任何寶石來源。」 – banditKing 2012-03-11 15:13:36
在更改gemfile中的版本號後，嘗試運行'bundle update annotate'。我發現有時簡單的'bundle install'不起作用。 – nmott 2012-03-11 21:35:15
工作！哇這東西比我想象的更復雜！ – banditKing 2012-03-12 00:10:10