未定義的方法`cattr_accessor」的RailsUpgrade ::升級的版本:: RouteRedrawer：

Question

類

我升級一個Rails 2應用到Rails 3 然後我安裝rails-upgrade寶石：

$ gem install rails-upgrade --user-install 
Fetching: rails-upgrade-0.0.2.gem (100%) 
PostInstall.txt 
Successfully installed rails-upgrade-0.0.2 
1 gem installed 
Installing ri documentation for rails-upgrade-0.0.2... 
Installing RDoc documentation for rails-upgrade-0.0.2... 

然後我跑check，但它引發了這個錯誤：

$ rails-upgrade check 
/home/neoriddle/.gem/ruby/1.8/gems/rails-upgrade-0.0.2/lib/rails-upgrade/upgraders/routes.rb:28: undefined method `cattr_accessor' for RailsUpgrade::Upgraders::RouteRedrawer:Class (NoMethodError) 
    from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require' 
    from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require' 
    from /home/neoriddle/.gem/ruby/1.8/gems/rails-upgrade-0.0.2/lib/rails-upgrade.rb:12 
    from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `gem_original_require' 
    from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:55:in `require' 
    from /home/neoriddle/.gem/ruby/1.8/gems/rails-upgrade-0.0.2/bin/rails-upgrade:7 
    from /home/neoriddle/.gem/ruby/1.8/bin/rails-upgrade:19:in `load' 
    from /home/neoriddle/.gem/ruby/1.8/bin/rails-upgrade:19 

什麼是錯，我該如何解決它？

我已經安裝了Rails 3和所有的依賴需要：

$ rails -v 
Rails 3.0.9 
$ ruby -v 
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-linux] 
$ gem list active 

*** LOCAL GEMS *** 

active_scaffold_vho (3.0.20) 
activemerchant (1.15.0, 1.14.0) 
activemodel (3.0.9, 3.0.7, 3.0.5, 3.0.3) 
activerecord (3.0.9, 3.0.7, 3.0.3, 2.3.11, 2.3.5, 2.2.3, 2.1.2, 2.1.1, 2.0.5, 1.15.3) 
activeresource (3.0.9, 3.0.7, 3.0.3, 2.3.11, 2.3.5, 2.2.3, 2.1.2, 2.1.1) 
activesupport (3.0.9, 3.0.7, 3.0.5, 3.0.3, 2.3.11, 2.3.5, 2.2.3, 2.1.2, 2.1.1, 2.0.5, 1.4.2) 
$ gem list action 

*** LOCAL GEMS *** 

actionmailer (3.0.9, 3.0.7, 3.0.3, 2.3.11, 2.3.5, 2.2.3, 2.1.2, 2.1.1, 1.3.3) 
actionpack (3.0.9, 3.0.7, 3.0.3, 2.3.11, 2.3.5, 2.2.3, 2.1.2, 2.1.1, 1.13.3) 
actionwebservice (1.2.6, 1.2.3) 

如果你需要更多的Infor請提問。

Answer 1

我不認爲這個寶石已被更新爲與Rails 3兼容。唯一的另一種選擇是抓住Rails 3 Upgrade Handbook的副本並使用它來完成升級過程。

我寫了一篇關於將Rails 2應用程序升級到Rails 3的博客文章：http://ryanbigg.com/2010/11/the-rails-3-upgrade/。