Ruby on rails Rails 6:未初始化的常量ActionText:：Engine:：ApplicationController（NameError） Puma捕获到此错误：未初始化的常量ActionText:：Engine:：ApplicationController（NameError） C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actiontext-6.0.1/lib/action_text/engine.rb:43:in `块（两级）in' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:429:in'instance\u exec' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:429:in`block in make\u lambda' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:201:in`block（2个级别）处于暂停状态' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u-support/callbacks.rb:607:in`block（2个级别）中的默认\u终止符' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:606:in'catch' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:606:in`block in default\u terminator' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:202:in'block in halting' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:514:in`block in invoke\u before' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:514:in'each' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:514:in'invoke\u before' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/callbacks.rb:134:in'run\u callbacks' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/execution\u wrapper.rb:119:in'complete！' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u-support/execution\u-wrapper.rb:76:in `确保在块中运行！' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u-support/execution\u-wrapper.rb:76:in`block-in-run！' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u support/execution\u wrapper.rb:70:in'tap' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active\u-support/execution\u-wrapper.rb:70:in'run！' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action\u dispatch/middleware/executor.rb:12:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action\u dispatch/middleware/static.rb:126:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action\u dispatch/middleware/host\u authorization.rb:83:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/webpacker-4.2.0/lib/webpacker/dev_server_proxy.rb:23:in'perform_request' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/rack-proxy-0.6.5/lib/rack/proxy.rb:57:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/railties-6.0.1/lib/rails/engine.rb:526:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/configuration.rb:228:in'call' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:667:in'handle_request' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:470:in'process\u client' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:328:in'block in run' C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/thread\u pool.rb:134:in`block in spawn\u thread'

您的应用程序很可能缺少

ApplicationController

类。请您仔细检查一下箱子是否在

app/controllers/application\u controller.rb下

如果你不能马上找到文件，别担心！您的应用程序的结构可能不依赖于定义
ApplicationController
。ActionText有一个长期存在的问题，因此您可能难以使用它

您可以跟踪讨论在不依赖默认值的项目中使用
ActionText
的这个公开问题
ApplicationController
类：

如果不是这样，那么您可以通过在上述目录中创建类来克服这个问题

享受吧
 欢迎来到stackoverflow。请注意，这篇文章并不构成这个网站的适当问题。你应该花点时间阅读，然后回到这里，根据那里的所有指南更新你的帖子。具体来说，你需要在你的帖子中包含一个实际问题，你为解决这个问题所采取的步骤，解释你是如何做到这一点的，最好是一个。你能在一个新的Rails项目上复制这个吗？我遇到了这个问题，并且应用程序控制器仍然存在于正确的位置。@courtsimas你能不能利用这个机会创建一个带有回溯、应用程序控制器和config/application.rb文件的新帖子。如果你想让我看一下，你可以在这里分享帖子链接：）如果你有ApplicationController，请检查那里的语法错误
Puma caught this error: uninitialized constant ActionText::Engine::ApplicationController (NameError)
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actiontext-6.0.1/lib/action_text/engine.rb:43:in `block (2 levels) in <class:Engine>'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:429:in `instance_exec'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:429:in `block in make_lambda'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:201:in `block (2 levels) in halting'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:607:in `block (2 levels) in default_terminator'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:606:in `catch'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:606:in `block in default_terminator'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:202:in `block in halting'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:514:in `block in invoke_before'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:514:in `each'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:514:in `invoke_before'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/callbacks.rb:134:in `run_callbacks'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/execution_wrapper.rb:119:in `complete!'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/execution_wrapper.rb:76:in `ensure in block in run!'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/execution_wrapper.rb:76:in `block in run!'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/execution_wrapper.rb:70:in `tap'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.1/lib/active_support/execution_wrapper.rb:70:in `run!'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/executor.rb:12:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/static.rb:126:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/actionpack-6.0.1/lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/webpacker-4.2.0/lib/webpacker/dev_server_proxy.rb:23:in `perform_request'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/rack-proxy-0.6.5/lib/rack/proxy.rb:57:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/railties-6.0.1/lib/rails/engine.rb:526:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/configuration.rb:228:in `call'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:667:in `handle_request'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:470:in `process_client'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/server.rb:328:in `block in run'
C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/puma-4.3.0/lib/puma/thread_pool.rb:134:in `block in spawn_thread'