Ruby 未定义的“救援响应”方法&x27；对于ActionDispatch:：ShowExceptions:Class（NoMethodError）

在我的ruby 2.3.1中，出现以下错误：

 => Booting WEBrick
=> Rails 4.2.6 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/will_paginate-3.0.pre2/lib/will_paginate/railtie.rb:15:in `block in <class:Railtie>': uninitialized constant WillPaginate::Railtie::Forbidden (NameError)
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
        from /root/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!'
        from /home/bistipweb/config/environment.rb:5:in `<top (required)>'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/polyglot-0.3.1/lib/polyglot.rb:64:in `require'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/polyglot-0.3.1/lib/polyglot.rb:64:in `require'
        from /home/bistipweb/config.ru:3:in `block in <main>'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `instance_eval'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `initialize'
        from /home/bistipweb/config.ru:in `new'
        from /home/bistipweb/config.ru:in `<main>'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in `eval'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in `new_from_string'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/builder.rb:40:in `parse_file'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/server.rb:299:in `build_app_and_options_from_config'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/server.rb:208:in `app'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in `app'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.0/lib/rack/server.rb:336:in `wrapped_app'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in `log_to_stdout'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in `start'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        from /root/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
        from bin/rails:4:in `require'
        from bin/rails:4:in `<main>'

我怎样才能修好它

试试看：

initializer "will_paginate.action_dispatch" do |app|
  if defined?(ActionController::Base)
    config.action_dispatch.rescue_responses.update('ActionController::Forbidden'=>Forbidden)
  end
end

---

如果您使用的是最新的

will\paginate

版本，则不必为将

will\paginate

挂接到Rails项目中添加任何初始值设定项代码

---

我看到您正在使用

3.0.pre2

版本，在您的GEM文件中将其更新为

3.0.7

，

捆绑更新将对
进行分页，并删除您在
railtie.rb
中添加的所有代码，我认为一切都会正常。
我找不到任何理由让您添加railtie.rb文件。我相信只要添加gem并在您的视图中使用它就可以了。
ActionDispatch:：ShowExceptions
应该是
ActionDispatch:：ShowExceptions
（您缺少了一个
c
）请检查我编辑的问题此API自rails 3.x:以来已被弃用，因此如何修复它？…如错误消息中所述-
请使用railtie或在应用程序配置中配置例外。（从位于/home/app/demo/app/controllers/application\u controller.rb:31的ApplicationController调用）
trued。。。。得到的错误与此相同：
未初始化常量WillPaginate:：Railtie:：Forbidden（NameError）
我不熟悉该功能，但您似乎阅读了一个非常旧的文档来实现，我建议你在最近的文档中阅读如何做到这一点…你能给我提供最新文档的链接吗？正如我所说的-我不熟悉该功能，所以。。。不，我不知道最近的文档在哪里这听起来更合理，你能给我原始的
railtie.rb
文件吗？在修改
railtie.rb
之前，我没有进行备份。我的错：（只需删除railtie.rb中模块WillPaginate的代码。我认为删除后，如果您没有任何其他添加的代码，该文件将为空。如果是，只需删除该文件。因此，您希望我删除
railtie.rb
中的全部代码吗？如果您railtie.rb几乎是will_paginate，则可以删除整个文件。是的……但是
will\u paginate
也很重要。我使用的是rails 4.2.6，需要添加合适版本的
will\u paginate
。所以从
3.0.pre2
更新到
3.0.7
，正如Larry Lv所建议的那样可能有效是的。我知道……我没有说gem的版本无关紧要……我只是说rb文件不是必需的。。。
initializer "will_paginate.action_dispatch" do |app|
  if defined?(ActionController::Base)
    config.action_dispatch.rescue_responses.update('ActionController::Forbidden'=>Forbidden)
  end
end