我如何使用Clockwork Rails调度程序Gem？ [英] How do I use the Clockwork Rails scheduler Gem?

问题描述

我在Clockwork调度程序过程的语法上遇到问题。我实际上有类似的问题，在这个线程讨论，但从来没有完全回答（我如何使用Rails的clockwork gem来运行rake任务？）

我的'scheduler.rake'工作正常当我用'heroku rake send_notifications'测试它时。我的clock.rb进程正在工作，因为它会每隔30秒触发一次。但是，我在使用clock.rb的语法来正确运行'rake.scheduler'中的'send_notifications'任务时遇到了问题。下面是它的样子：

 ＃scheduler.rake 
 desc这个任务由Heroku调度器add- on
任务：send_notifications => ：环境做
 
放这个测试工作正常！ 
 
 end 
  

以下是clock.rb的样子：

 需要File.expand_path（'../../ config / boot'，__FILE__）
需要File.expand_path（'。 ./../config/environment'，__FILE__）
需要'发条'
 
包括发条
 
每个（30.seconds，'发送通知'）{ 
＃Heroku :: API.new.post_ps（'pocket-pal'，'rake scheduler：send_notifications'）
 rake scheduler：send_notifications 
} 
  
 
 
正如你所看到的，我已经尝试过使用Heroku API并调用rake的分离进程。
 
 
 
当我使用Heroku API时，出现以下错误： 
 
 
 错误 - ：未初始化的常量Heroku（NameError） 
  
当我调用rake时，出现以下错误：
 
 
  ERROR  - ：未定义的局部变量或方法send_notifications for main：Object（NameError）
  
有人知道这两种方法的正确语法吗？        a href =https://stackoverflow.com/a/11516026/3448554>这个答案很有用，但是你需要严格遵循它的字符串语法。所以在你的情况下：
  every（30.seconds，'发送通知'）{
`rake scheduler：send_notifications` 
} 
  
这意味着确保使用``用于包装rake任务，而不是，因为这会让几个人绊倒。
 
I'm having problems with the syntax for the Clockwork scheduler process. I'm actually having similar issues to what is discussed in this thread but never fully answered(How do I use Rails clockwork gem to run rake tasks?)

My 'scheduler.rake' is working correctly when I test it with a 'heroku rake send_notifications'. My clock.rb process is working too as it will trigger every 30 seconds. However, I'm having issues with the clock.rb's syntax to correctly run the 'send_notifications' task in my 'rake.scheduler'. Here's what it looks like:
# scheduler.rake
desc "This task is called by the Heroku scheduler add-on"
task :send_notifications => :environment do

   puts "this test is working correctly!"

end
Here's what clock.rb looks like:
require File.expand_path('../../config/boot',        __FILE__)
require File.expand_path('../../config/environment', __FILE__)
require 'clockwork'

include Clockwork

every(30.seconds, 'Send notifications') {
   # Heroku::API.new.post_ps('pocket-pal', 'rake scheduler:send_notifications')
    rake scheduler:send_notifications
}
As you can see I've tried with a detached process using the Heroku API and invoking rake.

When I use the Heroku API, I get this error:
ERROR -- : uninitialized constant Heroku (NameError)
When I invoke rake, I get the following error:
ERROR -- : undefined local variable or method `send_notifications' for main:Object (NameError)
Does anyone know what the correct syntax is for either approach?
解决方案
This answer works, however you need to follow its string syntax exactly.  So in your case:
every(30.seconds, 'Send Notifications') {
  `rake scheduler:send_notifications`
}
That means making sure to use ` ` for wrapping the rake task, not " " as that's tripped a few people up.

                        
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