Ruby on rails &引用；“未找到订阅类别”；ActionCable的问题

我使用Rails 5.1.5，我有以下代码

app/channels/application\u cable/channel.rb

module ApplicationCable
  class Channel < ActionCable::Channel::Base
  end
end

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user
    def connect
      self.current_user = find_verified_user
      logger.add_tags 'ActionCable', current_user.slug
    end
    private
    def find_verified_user
      if verified_user = env['warden']&.user
        verified_user
      else
        reject_unauthorized_connection
      end
    end
  end
end

class NotificationsCountChannel < ApplicationCable::Channel
  def subscribed
  end
end

客户端可以成功连接到位于“/cable”默认路径的WebSocket。但是订阅NotificationsOntChannel并不成功。以下是日志：

Started GET "/cable" for 127.0.0.1 at 2018-02-24 20:50:31 +0300
Started GET "/cable/" [WebSocket] for 127.0.0.1 at 2018-02-24 20:50:31 +0300
Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
Subscription class not found: "NotificationsCountChannel"

此外，我无法在rails控制台中检查

NotificationScontChannel

：

namererror（未初始化的常量notificationscontchannel）

看起来Rails没有加载NotificationsOntChannel类。
运行

bin/rails r'会放置ActiveSupport:：Dependencies。自动加载路径'

会提供不包含

app/channels

的路径列表。可通过添加

config.autoload_路径+=%W（#{config.root}/app/services）

到config/application.rb，但它不能解决主要问题

---

我错过了什么？

答案很简单：注意力不集中。
实际上，

channels

dir位于项目的根目录中，而不是

app

dir中

Started GET "/cable" for 127.0.0.1 at 2018-02-24 20:50:31 +0300
Started GET "/cable/" [WebSocket] for 127.0.0.1 at 2018-02-24 20:50:31 +0300
Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
Subscription class not found: "NotificationsCountChannel"