未定義的方法`html_safe？'使用rails-ckeditor與formtastic時出錯

Question

我試圖讓rails-ckeditor gem工作。我按照README上的說明進行操作。 但我得到這個錯誤

undefined method `html_safe?' for #<String:0xb6b6d080> 

這是我formtastic表單代碼：

<%= f.input :content, :as => :ckeditor %> 

任何想法？謝謝！

UPDATE 我使用Rails 2.3.8。這裏是堆棧跟蹤。

/usr/lib/ruby/gems/1.8/gems/ckeditor-3.4.3/lib/ckeditor/safe_buffer.rb:6:in `<<' 
    /usr/lib/ruby/gems/1.8/gems/ckeditor-3.4.3/lib/ckeditor/view_helper.rb:52:in `ckeditor_textarea' 
    /usr/lib/ruby/gems/1.8/gems/ckeditor-3.4.3/lib/ckeditor/formtastic.rb:9:in `send' 
    /usr/lib/ruby/gems/1.8/gems/ckeditor-3.4.3/lib/ckeditor/formtastic.rb:9:in `ckeditor_input' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:1281:in `send' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:1281:in `inline_input_for' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:109:in `send' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:109:in `input' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:108:in `map' 
    /usr/lib/ruby/gems/1.8/gems/formtastic-1.1.0/lib/formtastic.rb:108:in `input' 
    /home/shreyas/repos/citymgmt/app/views/articles/_form.html.erb:4 
    /home/shreyas/repos/citymgmt/app/views/articles/_form.html.erb:2:in `_run_erb_app47views47articles47_form46html46erb_locals_form_object' 
    /home/shreyas/repos/citymgmt/app/views/articles/_form.html.erb:1:in `_run_erb_app47views47articles47_form46html46erb_locals_form_object' 
    /home/shreyas/repos/citymgmt/app/views/articles/new.html.erb:10 
    /home/shreyas/repos/citymgmt/app/views/articles/new.html.erb:3:in `_run_erb_app47views47articles47new46html46erb' 

Answer 1

您是否正在運行早於Rails版本的3.0.0版本？您需要安裝提供此功能的rails_xss插件。在Rails 3中，這是標準。

如果可能，我會建議儘快升級到Rails 3。

Answer 2

您是否有堆棧跟蹤？根據錯誤，我假設插件加載順序導致字符串不能通過SafeBuffer支持實例化（這也導致我相信您正在使用Rails 2）。

你能提供一些上下文嗎？