“const_missing 中的救援” Ruby 1.9.1、Rails 2.3.2 和 jrails 0.4 出现错误

Question

我最近启动了一个项目，团队决定使用 jQuery 而不是 Prototype/Scriptaculous 来满足我们的 javascript 需求。 我们建立了我们的项目，并开始转换。 该插件是通过这些说明安装的，一切都按计划进行。 不久之后，当尝试运行“./script/server”时，我们收到以下错误：

=> Rails 2.3.2 application starting on http://0.0.0.0:3000
/usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:105:in `rescue in const_missing': uninitialized constant ActionView::Helpers::JavaScriptElementProxy::ActionView (NameError)
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:94:in `const_missing'
    from /home/company/Development/project/vendor/plugins/jrails/lib/jrails.rb:229:in `<class:JavaScriptElementProxy>'
    from /home/company/Development/project/vendor/plugins/jrails/lib/jrails.rb:226:in `<module:Helpers>'
    from /home/company/Development/project/vendor/plugins/jrails/lib/jrails.rb:2:in `<module:ActionView>'
    from /home/company/Development/project/vendor/plugins/jrails/lib/jrails.rb:1:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `block in require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:521:in `new_constants_in'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
    from /home/company/Development/project/vendor/plugins/jrails/init.rb:6:in `block in evaluate_init_rb'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin.rb:146:in `eval'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin.rb:146:in `block in evaluate_init_rb'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin.rb:142:in `evaluate_init_rb'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin.rb:48:in `load'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin/loader.rb:38:in `block in load_plugins'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin/loader.rb:37:in `each'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/rails/plugin/loader.rb:37:in `load_plugins'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/initializer.rb:348:in `load_plugins'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/initializer.rb:163:in `process'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/initializer.rb:113:in `run'
    from /home/company/Development/project/config/environment.rb:9:in `<top (required)>'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `block in require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:521:in `new_constants_in'
    from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/rails-2.3.2/lib/commands/server.rb:84:in `<top (required)>'
    from script/server:3:in `require'
    from script/server:3:in `<main>'

我进行了大量搜索，但找不到此错误的原因，也找不到有关版本兼容性问题的任何文档。 你们能提供的任何帮助将不胜感激。

谢谢，

迈克·特普西奇

Answer 1

看起来它已经被修补以与 Ruby 1.9 一起使用，尝试从这个 git 存储库而不是主站点获取它：
http://github.com/cheald/jrails/tree/master