【ActionCable】文字を入力するとNameError - undefined local variable or method `data'

Question

Rails5.2です

最短で作るActionCableチャットアプリ
上記を参考に簡単なチャットを作ろうとしてます。

文字を入力してEnter→文字をappendしたいのですが画面に何も表示されません。

サーバのログにエラーメッセージは出てるようなのですが、
原因がよく分かりません。
(NameError - undefined local variable or method `data')

分かる方教えていただけないでしょうか？

エラーメッセージ

ChatChannel#post({"message"=>"っっっっっっっっっっっっっっっっっっっｑ"})
Started GET "/in_progress" for 58.13.43.197 at 2020-07-13 04:15:31 +0000
Cannot render console from 58.13.43.197! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Could not execute command from ({"command"=>"message", "identifier"=>"{\"channel\":\"ChatChannel\"}", "data"=>"{\"message\":\"っっっっっっっっっっっっっっっっっっっｑ\",\"action\":\"post\"}"}) [NameError - undefined local variable or method `data' for #<ChatChannel:0x00007f707d1743b0>]: /home/ec2-user/environment/vvv/app/channels/chat_channel.rb:12:in `post' | /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/actioncable-5.2.4.3/lib/action_cable/channel/base.rb:268:in `public_send' | /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/actioncable-5.2.4.3/lib/action_cable/channel/base.rb:268:in `dispatch_action' | /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/actioncable-5.2.4.3/lib/action_cable/channel/base.rb:168:in `block in perform_action' | /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/activesupport-5.2.4.3/lib/active_support/notifications.rb:170:in `instrument'
Processing by MessagesController#in_progress as HTML

app/assets/javascripts/channels/chat.js

App.chat = App.cable.subscriptions.create("ChatChannel", {

  connected: function() {},
  disconnected: function() {},
  received: function(data) {
    alert(data['message']);
    return $('#test').append('<p>' + data['message'] + '</p>');
  },

  post: function(message) {
    return this.perform('post', { message: message });
  }
}, $(document).on('keypress', '[data-behavior~=chat_post]', function(event) {
  if (event.keyCode === 13) {
    var chatForm = $('#chat-form');
    App.chat.post(chatForm.val());
    return chatForm.val('');
  }
}));

/app/channels/chat_channel.rb

class ChatChannel < ApplicationCable::Channel
  def subscribed
     stream_from "chat_channel"
  end

  def unsubscribed
    # Any cleanup needed when channel is unsubscribed
  end

  def post 
    ActionCable.server.broadcast('chat_channel', data)
  end
end

app/views/messages/in_progress.html.erb

<div id="test">ここにメッセージ追加してみるテスト</div>

/app/controllers/messages_controller.rb

class MessagesController < ApplicationController
 
  def in_progress
  end
  
end

config/routes.rb

 get '/in_progress', to: 'messages#in_progress', as: 'in_progress'

以上です。
宜しくお願い致します。

Answer 1

def post → def post(data)
でした。

お騒がせしました。