ruby-on-rails - ActionCable 不更新页面

Question

我正在创建一个 ruby​​ 应用程序，我正在尝试实现操作电缆，当用户发布帖子时，我希望为所有用户更新帖子索引。在我的 channels/posts.js 中我有:

App.posts = App.cable.subscriptions.create("PostsChannel", {
  connected: function() {
    // Called when the subscription is ready for use on the server
  },

  disconnected: function() {
    // Called when the subscription has been terminated by the server
  },

  received: function(data) {
    // Called when there's incoming data on the websocket for this channel
    console.log(data)
    $('#list').html("<%= escape_javascript render('list') %>")
  }
});

在 PostRelayJob.rb 我有:

class PostRelayJob < ApplicationJob
  queue_as :default

  def perform(post)
    ActionCable.server.broadcast "posts",
    post: PostsController.render(list)
    # Do something later
  end
end

在 models/post.rb 中:

after_commit { PostRelayJob.perform_later(self) }

当我在服务器控制台中添加帖子时，我得到:

[ActiveJob] [PostRelayJob] [57126ec7-b091-48fc-91aa-2f940caa9421] Performing PostRelayJob from Async(default) with arguments: #<GlobalID:0x00000003aa10d8 @uri=#<URI::GID gid://today-i-have2/Post/15>>
[ActiveJob] Enqueued PostRelayJob (Job ID: 57126ec7-b091-48fc-91aa-2f940caa9421) to Async(default) with arguments: #<GlobalID:0x000000037af000 @uri=#<URI::GID gid://today-i-have2/Post/15>>
[ActiveJob] [PostRelayJob] [57126ec7-b091-48fc-91aa-2f940caa9421] Performed PostRelayJob from Async(default) in 3.66ms

Rendering posts/create.js.erb
Rendered posts/_list.html.erb (7.5ms)
Rendered posts/create.js.erb (9.0ms)

但是其他浏览器中的帖子没有更新，我是 Rails 的新手，所以非常感谢任何帮助。

Answer 1

我认为这种行为是在您在 Rails 控制台中创建 Post 对象 的情况下出现的。这在很大程度上取决于您的 ActionCable 配置，但我认为您没有在开发环境中使用 Redis。

开发环境的默认配置是使用async 适配器。此适配器仅在同一进程内工作。要启用跨进程通信，您需要一个备用适配器。

我的建议是安装 Redis(例如通过 brew redis)，使用 redis-server 启动它并使用以下内容更新您的 config/cable.yml:

development:
  adapter: redis
  url: redis://localhost:6379