【问题标题】：ActionCable displaying message in multiple channelsActionCable 在多个频道中显示消息
【发布时间】：2017-02-17 16:57:53
【问题描述】：

我正在使用 ActionCable 在我的游戏室（游戏）内实现聊天。到目前为止，这是我的代码：

app/channels/game_channel.rb:

class GameChannel < ApplicationCable::Channel
  def subscribed
    stream_from "game_channel_#{params[:game]}" 
  end

  def unsubscribed
    # Any cleanup needed when channel is unsubscribed
  end

  def speak (data)
     ActionCable.server.broadcast("game_channel_#{params[:game]}", data) 
  end
end

app/assets/javascripts/channels/game.js.erb：

<% Game.all.each do |game| %>  

  App['game' + <%=game.id%>] = App.cable.subscriptions.create({channel: 'GameChannel', game: <%= game.id %>}, {  
  received: function(data) {
   alert(message)
   },

  setGameId: function(gameId) {
    this.gameId = gameId
  },
  
  speak: function(data) {
    this.perform('speak'), message => data['message']
    }
});
<% end %>

当我发送命令时：

App.game1.speak (message: "Test1", player: 1, game:1)

--> Alerts Msg:"Test1" @ Game 1.

App.game2.speak (message: "Hello", player: 2, game:2)

--> Alerts Msg "Hello" @ Game 2, AND @ Game 1 它再次提醒 msg: "Test1"。

如何解决这个问题，只显示@更新游戏的消息，而不在其他游戏房间更新？

服务器正在显示：

17:03:01 web.1  | GameChannel is transmitting the subscription confirmation
17:03:01 web.1  | GameChannel is streaming from game_channel_2
17:03:01 web.1  | GameChannel is transmitting the subscription confirmation
17:03:01 web.1  | GameChannel is streaming from game_channel_1
17:03:06 web.1  | GameChannel#speak
17:03:06 web.1  | [ActionCable] Broadcasting to game_channel_1: {"action"=>"speak"}
17:03:06 web.1  | GameChannel transmitting {"action"=>"speak"} (via streamed from game_channel_1)
17:03:06 web.1  | GameChannel transmitting {"action"=>"speak"} (via streamed from game_channel_1)
17:03:11 web.1  | GameChannel#speak
17:03:11 web.1  | [ActionCable] Broadcasting to game_channel_2: {"action"=>"speak"}
17:03:11 web.1  | GameChannel transmitting {"action"=>"speak"} (via streamed from game_channel_2)
17:03:11 web.1  | GameChannel transmitting {"action"=>"speak"} (via streamed from game_channel_2)

【问题讨论】：

标签： ruby-on-rails ruby websocket actioncable

【解决方案1】：

这是我的解决方案（我不知道，但似乎不对），任何 cmets？我在我的 game.js.erb 中添加了以下条件：

<% Game.all.each do |game| %>  
  App['game' + <%= game.id %>] = App.cable.subscriptions.create({channel: 'GameChannel', game: <%= game.id %>}, {  
  received: function(data) {
  if (game == <%= game.id %>) {
  alert ('message: ' + message + '; game: ' + <%= game.id %> + '; game: ' + game);
      }},

  setGameId: function(gameId) {
    this.gameId = gameId
  },

  speak: function(data) {
    this.perform('speak')
    }
});
<% end %>

基本上我是在比较发送的游戏和游戏室ID。

【讨论】：