Question

我在使用Action Cable时遇到问题，每当我运行程序时，都会收到一条错误消息，指出Subscription找不到类ConversationChannel

当我尝试发送消息时，我得到了这个日志

成功升级到WebSocket（REQUEST_METHOD：GET， HTTP_CONNECTION：升级，HTTP_UPGRADE：websocket）订阅类找不到：＆＃34; ConversationChannel＆＃34;无法执行命令 {＆＃34;命令＆＃34; = GT;＆＃34;消息＆＃34 ;, ＆＃34;标识符＆＃34; = GT;＆＃34; {\＆＃34;信道\＆＃34;：\＆＃34; ConversationChannel \＆＃34;}＆＃34 ;, ＆＃34;数据＆＃34; =＆GT;＆＃34; {\＆＃34;消息\＆＃34;：[{\＆＃34;名称\＆＃34;：\＆＃34; conversation_id \＆＃34; \＆＃34;值\＆＃34;：\＆＃34; 2 \＆＃34;}，{\＆＃34;名称\＆＃34;：\＆＃34; amitian_id \＆＃34; \＆＃34;值\＆＃34;：\＆＃34; 1 \＆＃34;}，{\＆＃34;名称\＆＃34;：\＆＃34;主体\＆＃34; \＆＃34;值\＆＃34;：\＆＃34; NMM \＆＃34;}]，\＆＃34;操作\＆＃34;：\＆＃34;说话\＆＃34;}＆＃34;}） [RuntimeError - 无法找到带标识符的订阅： {＆＃34;信道＆＃34;：＆＃34; ConversationChannel＆＃34;}]： C：/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/actioncable-5.0.1/lib/action_cable/connection/subscriptions.rb：74：在 find' | C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/actioncable-5.0.1/lib/action_cable/connection/subscriptions.rb:53:in perform_action＆＃39; | C：/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/actioncable-5.0.1/lib/action_cable/connection/subscriptions.rb：17：在 execute_command' | C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/actioncable-5.0.1/lib/action_cable/connection/base.rb:88:in dispatch_websocket_message＆＃39; | C：/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/actioncable-5.0.1/lib/action_cable/server/worker.rb：58：在 `阻止调用＆＃39;

ConversationChannel.rb

class ConversationChannel < ApplicationCable::Channel
  def subscribed
    # stream_from "some_channel"
    stream_from "conversations-#{current_amitian.id}"
  end

  def unsubscribed
    # Any cleanup needed when channel is unsubscribed
    stop_all_streams
  end

  def speak(data)

    message_params = data['message'].each_with_object({}) do |el, hash|
      hash[el.values.first] = el.values.last
    end

    ActionCable.server.broadcast(
      "conversations-#{current_amitian.id}",
      message: message_params
    )
  end 
 end

conversation.js

App.conversation = App.cable.subscriptions.create("ConversationChannel", {
  connected: function() {

  },
  disconnected: function() {

  },
  received: function(data) {
  console.log(data['message']);
  },
  speak: function(message) {
    return this.perform('speak' , {
    message: message
    });
  }
});

$(document).on('submit', '.new_message', function(e) {
  e.preventDefault();
  var values = $(this).serializeArray();
  App.conversation.speak(values);
  $(this).trigger('reset');
});

connection.rb

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_amitian

    def connect
        self.current_amitian = find_verified_amitian
    end

    protected

    def find_verified_amitian
        if(current_amitian = env['warden'].amitian)
            current_amitian
        else
            reject_unauthorized_connection
        end
    end
  end
end

使用上面给出的日志文件，任何人都可以告诉我为什么它找不到我的conversation_channel.rb文件？

Answer 1

我已经通过将频道文件移到一个目录来解决它。

来自app/channels/application_cable/conversation_channel.rb 到app/channels/conversation_channel.rb

Answer 2

您必须在客户端（JS）代码中提供完整的Module :: Class名称。对于例如如果您的ConversationChannel课程在ApplicationCable模块中，那么在您的客户端而不仅仅是ConversationChannel，您需要执行ApplicationCable::ConversationChannel

Answer 3

您的文件需要命名为conversation_channel.rb，因为snake_case是频道文件名的rails约定。

未找到订阅类＆＃39; MyChannel＆＃39;在ActionCable中

3 个答案: