ActionView::Template::Error: undefined method 'body' when using sidekiq to render ActionCable broadcast

Question

我正在设置 ActionCable 以处理我的应用程序的消息传递，但卡在一个我无法理解的 undefined method 错误中。

创建消息后，ActionCable 广播被委托给后台工作人员：

model.rb

class Message < ApplicationRecord
 after_create_commit { MessageBroadcastWorker.perform_async self }
 validates :body, presence: true
end

message_broadcast_worker.rb

class MessageBroadcastWorker
 include Sidekiq::Worker

 def perform(message)
  ActionCable.server.broadcast('messages_channel', message: render_message(message))
 end

 private
  def render_message(message)
   ApplicationController.renderer.render(partial: 'messages/message', locals: { message: message })
  end
end

消息索引页面呈现对话中的所有消息：

index.html.erb

<%= render @messages %>

_message.html.erb:

<% cache message do %>
  <div><%= message.body %></div>
<% end %>

但是我得到这个错误：

2020-03-22T16:41:01.733Z pid=597 tid=owznmnngh class=MessageBroadcastWorker jid=11d9da030dd20e89cd6c774e INFO: start
2020-03-22T16:41:01.808Z pid=597 tid=owznmnngh class=MessageBroadcastWorker jid=11d9da030dd20e89cd6c774e elapsed=0.075 INFO: fail
2020-03-22T16:41:01.808Z pid=597 tid=owznmnngh WARN: {"context":"Job raised exception","job":{"retry":true,"queue":"default","class":"MessageBroadcastWorker","args":["#<Message:0x00007f9f94227d48>"],"jid":"11d9da030dd20e89cd6c774e","created_at":1584844758.799895,"enqueued_at":1584895261.7334359,"error_message":"undefined method `body' for \"#<Message:0x00007f9f94227d48>\":String","error_class":"ActionView::Template::Error","failed_at":1584844758.877783,"retry_count":11,"retried_at":1584877194.326414},"jobstr":"{\"retry\":true,\"queue\":\"default\",\"class\":\"MessageBroadcastWorker\",\"args\":[\"#<Message:0x00007f9f94227d48>\"],\"jid\":\"11d9da030dd20e89cd6c774e\",\"created_at\":1584844758.799895,\"enqueued_at\":1584895261.7334359,\"error_message\":\"undefined method `body' for \\"#<Message:0x00007f9f94227d48>\\":String\",\"error_class\":\"ActionView::Template::Error\",\"failed_at\":1584844758.877783,\"retry_count\":11,\"retried_at\":1584877194.326414}"}
2020-03-22T16:41:01.808Z pid=597 tid=owznmnngh WARN: ActionView::Template::Error: undefined method `body' for "#<Message:0x00007f9f94227d48>":String
2020-03-22T16:41:01.808Z pid=597 tid=owznmnngh WARN: /Users/me/code/project/app/views/messages/_message.html.erb:3:in `block in _app_views_messages__message_html_erb__359591413316599227_70291875480180'

我知道什么是未定义的方法错误是但我无法推理为什么我在经过时无法在 message 上调用 body self 给模型中的后台工作者。

Answer 1

将 id 传递给 Sidekiq 而不是活动记录对象。

MessageBroadcastWorker.perform_async id

https://github.com/mperham/sidekiq/wiki/Best-Practices#1-make-your-job-parameters-small-and-simple

ActionView::Template::Error: undefined method 'body' when using sidekiq to render ActionCable broadcast

ActionView::Template::Error: undefined method 'body' when using sidekiq to render ActionCable broadcast

ruby-on-rails

sidekiq

actioncable