start_form_tag Rails1.x <%= start_form_tag :action => :hoge %> <%= end_form_tag %> Rails2.x <% form_tag :action => :hi do %> <% end %>

Rails1.x <%= start_form_tag :action => :hoge %> ///// <%= end_form_tag %> Rails2.x <% tag_form :action => :hoge %> ///// <% end %>

Railsの認証系のプラグインをいれようとした場合にエラーで入れれない．そんなときは $ ruby script/plugin install http://svn.rails-engines.org/plugins/engines $ ruby script/plugin install http://svn.rails-engines.org/plugins/login_engine