Ruby on rails 对控制器的每个请求执行长轮询

下面是实现长轮询的代码

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
  cattr_accessor :acArray
end

ApplicationController.acArray = []

class HelloController < ApplicationController
  def initialize
    ApplicationController.acArray << self
  end

  def index
    ApplicationController.acArray.each_with_index {|val, index|
      if index == 1 # only on second request serve the first request, until then hold the object in memory
          val.render :text => ApplicationController.acArray.length
      end
    }
  end
end

class ApplicationController

问题是第一个请求立即失败，并显示消息

缺少模板 缺少模板hello/index，带有{：locale=>[：en]，：formats=>[：html]，：handlers=>[：erb，：builder，：raw，：ruby，：jbuilder，：coffee]}的应用程序/索引。在以下位置搜索：“//主页/myhome/tmp/chat/app/views”

如何延迟渲染，不让rails搜索视图文件，也不返回失败状态

也许这样可以：

    until ApplicationController.acArray.length > 1 do |process|
    end
    ApplicationController.acArray.each_with_index{|val, index|
        if index == 1
            val.render :text => ApplicationController.acArray.length
        end 
    }
`

---

好奇的是，您是否尝试在错误发生之前立即打印acArray的长度值？我将p ApplicationController.acArray.length before next放在else块中，该块在错误之前打印1。这将阻止服务器。也直到不采取过程参数。