Rails 应用程序中的 Enqueue_at(..) 错误.Resque 调度程序引发 NoQueueError [英] Enqueue_at(..) error in rails app. Resque scheduler raises NoQueueError

问题描述

我在尝试使用 ResqueScheduler enqueue_at 时不断收到此错误

Resque::NoQueueError in QuestionsController#create作业必须放在队列中.

这是调用它的类:注意 after_create 回调.

在 Questions 控制器中引发错误的原因是因为 Question 有一个回调 on_create ，它反过来创建了一个 Assignment供用户使用.

这是这篇文章的后续问题:

resque 调度程序作业的奇怪行为

我已尝试按照此视频中给出的示例进行操作:http://railscasts.com/episodes/271-resque?view=comments

...以及阅读我在 Resque scheduler online 上可以找到的基本上所有内容(包括他们的文档:https://github.com/bvandenbos/resque-scheduler)

我有理由相信我做得对，但此时非常沮丧.这似乎是一个非常罕见的在线错误，文档很少.

<前>需要scheduler_job"类赋值 ActiveRecord::Base归属地:用户归属地:问题attr_accessible :title, :body, :user_id, :question_id , :response , :correctafter_create :queue_assignmentsbefore_destroy :remove_from_queue定义等级self.correct = (response == self.question.solution) 除非 response == nil结尾def queue_assignmentsResque.enqueue_at(self.question.schedule , SchedulerJob , :id => self.id)结尾def remove_from_queueResque.remove_delayed(SchedulerJob, :id => self.id)结尾定义发送警报电子邮件QuestionMailer.question(self)结尾def as_json(options={}){:正确 => 正确，:created_at => created_at,:id => id,:question_id => question_id,:响应 => 响应,:updated_at => updated_at,:user_id => user_id,:question => self.question}结尾结尾

这是工作:

<前>需要分配"需要 'QuestionMailer'# 当我把它改成一个类时这也不起作用模块调度器作业#this 也不适用于 :ready_queue 但我不知道有什么区别@ready_queue = "ready_queue"def self.perform(id)@assignment=Assignment.find_by_id(id)@assignment.sendAlertEmail结尾结尾

解决方案

好的，经过大量的故障排除和我的头撞墙，我终于让它工作了.

实例变量必须命名为@queue.问题是我将它命名为 @ready_queue.我猜 resque 调度程序需要这个.反正.它现在似乎正在工作.继续下一个错误.

I keep getting this error while trying to use ResqueScheduler enqueue_at

Resque::NoQueueError in QuestionsController#create
Jobs must be placed onto a queue.

Here is the class that's calling it: note the after_create callback.

The reason the error is raised in the Questions controller is because there is a callback on_create for Question which in turn, creates an Assignment for users.

This is a follow-up issue from this post:

Strange behavior with a resque scheduler job

I've tried to follow the examples givien in this video: http://railscasts.com/episodes/271-resque?view=comments

. . .as well as reading basically everything I can find on Resque scheduler online, (including their documentation here: https://github.com/bvandenbos/resque-scheduler)

I am reasonably confident that I am doing this right and pretty frustrated at this time. This seems to be a pretty rare error online with little documentation.

    require "scheduler_job"
    class Assignment  ActiveRecord::Base
      belongs_to :user
      belongs_to :question
      attr_accessible :title, :body, :user_id, :question_id , :response , :correct
      after_create :queue_assignments
      before_destroy :remove_from_queue


      def grade
        self.correct = (response == self.question.solution) unless response == nil
      end

      def queue_assignments
        Resque.enqueue_at(self.question.schedule , SchedulerJob , :id => self.id)
      end
      def remove_from_queue
        Resque.remove_delayed(SchedulerJob, :id => self.id)
      end
      def sendAlertEmail
        QuestionMailer.question(self)
      end
      def as_json(options={})
        {
          :correct => correct,
          :created_at =>  created_at,
          :id => id, 
          :question_id => question_id,
          :response => response ,
          :updated_at => updated_at,
          :user_id => user_id,
          :question => self.question
        }
      end
    end

And here is the job:

    require 'Assignment'
    require 'QuestionMailer'
    # this didnt work when i changed it to a class either
    module SchedulerJob


      #this didnt work with :ready_queue either but I dont know what the difference is
      @ready_queue = "ready_queue"
      def self.perform(id)
        @assignment=Assignment.find_by_id(id)
        @assignment.sendAlertEmail
      end


    end

解决方案

Ok so after a ton of troubleshooting and banging my head against the walls, I finally got it to work.

The instance variable Must be named@queue. The problem was that I was naming it @ready_queue. I guess resque scheduler requires this. Anyway. It seems to be working now. on to the next bug.

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