我从http://geminstallthat.wordpress.com/2008/02/25/run-rake-tasks-with-delayedjob-dj/发现了这个代码http://pastie.org/157390.

我将此代码作为DelayedRake.rb添加到我的lib目录中：

require 'rake'
require 'fileutils'

class DelayedRake
  def initialize(task,options = {})
     @task     = task
     @options  = options
 end

  ##
  # Called by Delayed::Job.
  def perform
    FileUtils.cd RAILS_ROOT

    @rake = Rake::Application.new
    Rake.application = @rake
    ### Load all the Rake Tasks.
     Dir[ "./lib/tasks/**/*.rake" ].each { |ext| load ext }
     @options.stringify_keys!.each do |key,value|
      ENV[key] = value  
     end
    begin
       @rake[@task].invoke
    rescue => e
       RAILS_DEFAULT_LOGGER.error "[ERROR]: task \"#{@task}\" Failed.  #{e}"
    end
 end
end

一切运行良好,直到delayed_job运行,它抱怨：

[错误]：任务“apn：notifications：deliver”失败.不知道如何构建任务’apn：notifications：deliver’

我如何让它知道apn_on_rails？我试过在DelayedRake的顶部要求’apn_on_rails_tasks’,它没有做任何事情.我还尝试将rake任务目录更改为./lib/tasks/*.rake

我对Ruby / Rails有些新意.这是在heroku上运行2.3.5.