外部模块中的 Rails Resque 未定义方法错误 [英] Rails Resque undefined method error in external module

问题描述

我无法从 resque Worker 中包含的模块调用方法.在下面的示例中，当我尝试调用 worker 内部的 say 方法(在 TestLib 模块中)时，我不断收到未定义的方法错误.为了说明问题，我已将代码简化为最基本的代码:

I'm having trouble calling methods from an included module inside a resque worker. In the example below, I keep getting undefined method errrors when I attempt to call the say method inside the worker (which is in the TestLib module). I've reduced the code down to bare basics to illustrate the issue:

控制器(/app/controllers/test_controller.rb)

Controller (/app/controllers/test_controller.rb)

class TestController < ApplicationController
  def testque
    Resque.enqueue( TestWorker, "HI" )
  end
end

图书馆(/lib/test_lib.rb)

Library (/lib/test_lib.rb)

module TestLib
  def say( word )
    puts word
  end
end

工人(/workers/test_worker.rb)

Worker (/workers/test_worker.rb)

require 'test_lib'

class TestWorker
  include TestLib

  @queue = :test_queue

  def self.perform( word )
    say( word ) #returns: undefined method 'say' for TestWorker:Class
    TestLib::say( word ) #returns: undefined method 'say' for TestLib::Module
  end
end

Rakefile(resque.rake)

Rakefile (resque.rake)

require "resque/tasks"
task "resque:setup" => :environment

我正在使用以下命令运行 resque:rake environment resque:work QUEUE='*'

I'm running resque using the following command: rake environment resque:work QUEUE='*'

宝石:导轨 (3.0.4)Redis (2.2.2)redis 命名空间 (1.0.3)resque (1.19.0)

Gems: rails (3.0.4) redis (2.2.2) redis-namespace (1.0.3) resque (1.19.0)

服务器:nginx/1.0.6

Server: nginx/1.0.6

有人对那里发生的事情有任何想法吗?

Anyone have any ideas as to what's going on there?

推荐答案

当你包含一个模块时，它的方法成为实例方法.当你扩展时，它们变成了类方法.您只需要将 include TestLib 更改为 extend TestLib 就可以了.

When you include a module, its methods become instance methods. When you extend, they become class methods. You just need to change include TestLib to extend TestLib and it should work.

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