唯一改变的是你订阅的频道。在这种情况下,它应该是一个特定的对话。你可以这样做:

消息.咖啡

$(document).on "turbolinks:load", ->
  messages = $("#messages-list")

  App.Messages = App.cable.subscriptions.create {
    channel: "MessagesChannel"
    # You can grab the conversation id as a data attribute from the messages container of your conversation and pass it as a parameter to the channel
    conversation_id: messages.data("conversation-id")
  },

  connected: ->

  disconnected: ->
    # Called when the subscription has been terminated by the server

  received: (data) ->
    messages.append(data["message"])
    $("#new_message")[0].reset();

消息_频道.rb

class MessagesChannel < ApplicationCable::Channel
  def subscribed
    stream_from "conversation_#{params['conversation_id']}_channel"
  end

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

消息_控制器.rb

# You can have something like this in your create action
def create
    message = @conversation.messages.build(message_params)
    message.user = current_user
    message.save

    ActionCable.server.broadcast "conversation_#{message.conversation.id}_channel",
      message: render_message(message)

    head :ok
end

private

  def set_conversation
    @conversation = Conversation.find(params[:conversation_id])
  end

  def render_message(message)
    render partial: "messages/message", locals: { message: message }
  end