將rails應用從2.2.2升級到2.3.5

Question

將應用從Rails 2.2.2升級到最新版本有多困難/複雜？

我已經看到從1.2版本升級等一些耙任務，但沒有看到任何意見小升級升級。

感謝，

丹尼

Error after upgrade 

macbook:trunk danny$ script/server 
=> Booting Mongrel 
=> Rails 2.3.5 application starting on http://0.0.0.0:3000 
/Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. Use #requirement 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:105:in `const_missing': uninitialized constant Rails::Plugin::OpenIdAuthentication (NameError) 
    from /Users/danny/Dropbox/SVN/railsapps/macandco/surveymanager/trunk/vendor/plugins/open_id_authentication/init.rb:16:in `evaluate_init_rb' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:182:in `call' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:182:in `evaluate_method' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:166:in `call' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:90:in `run' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:90:in `each' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:90:in `send' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:90:in `run' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:276:in `run_callbacks' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:51:in `send' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks' 
    from /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/initializer.rb:631:in `prepare_dispatcher' 
    from /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/initializer.rb:185:in `process' 
    from /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send' 
    from /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run' 
    from /Users/danny/Dropbox/SVN/railsapps/macandco/surveymanager/trunk/config/environment.rb:12 
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    from /Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:84 
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' 
    from script/server:3 

Answer 1

安裝新的寶石，改變你的Rails版本，並運行測試。應該沒有太多，如果有的話，需要改變你的代碼。我不記得在轉向2.3.5時遇到任何重大（或次要）問題。