Delayed_job无法运行用户定义的方法 [英] Delayed_job Won't Run User defined method

问题描述

我一直试图让DelayedJob在后台运行一些用户定义的方法。对于此测试用例，我在助手中定义了以下方法：

I have been trying to get DelayedJob to run some user defined methods in the background. For this test case I defined the following method in a helper:

 def test_case
    u = User.new
     u.first_name = "JimBob"
     u.last_name = "joe"
     u.email = "[e-mail]"
     u.password = "sailsJ123"
     u.password_confirmation = "sailsJ123"
     u.save
  end

然后，在控制器动作，我定义：

Then, in a controller action, I define:

  def action_name
     #whatever it does outside of this
     test_case

  end

这会导致test_case在此处执行操作时创建新用户跑。如果我尝试延迟工作，则将其更改为：

This causes test_case to create a new user when the action here is run. If I try to delay the job, I change it to:

  def action_name
     #whatever it does outside of this
     self.delay.test_case
  end

这将导致创建延迟作业，但有某些迹象表明我做错了：特别是，delay_job表中的处理程序包含在action_name中加载的所有其他信息（在这种情况下，该文件是一个大约50000个字符的非常大的文件），而不仅仅是指定运行test_case之类的东西。

This causes a delayed_job to be created, but with certain signs that I'm doing this wrong: specifically, the handler in the delayed_job table contains all the information loaded elsewhere in action_name (in this case a very large file of about 50000 characters), not just a simple handler specifying to run test_case or something.

如果我更改此设置以继续测试，则尝试这样做：

If I change this around to keep testing, I have tried to do:

 def action_name
     #whatever it does outside of this
     u = User.new
     u.first_name = "JimBob"
     u.last_name = "joe"
     u.email = "[e-mail]"
     u.password = "sailsJ123"
     u.password_confirmation = "sailsJ123"
     u.delay.save
  end

这会创建一个DJ成功完成，并且按预期方式加载了指定详细信息的处理程序（例如u.name => JimBob ...）。但是，当作业运行时，不会创建新用户。我什至尝试过切换它只是为了破坏用户（尽管考虑到密码字段的处理方式，尽管创建DJ用户可能很困难），但这还是行不通的。

This creates a DJ successfully and, as expected, it loads a handler specifying the details (eg u.name => "JimBob"...). But when the job is run no new user gets created. I've even tried to switch it just to destroy a user (i though maybe creating a user with DJ might be hard, given the way password fields are handled) but this doesn't work.

长话短说：

1. 如何让DJ正确运行后台方法？


2. 在创建看起来很简单的延迟作业的情况下，如何对数据库进行任何更改？

推荐答案

您不能在ActiveRecord模型上延迟#save，因为DJ将在执行操作之前尝试从数据库中重新加载模型。所有数据将丢失。而是使用创建用户的#perform方法创建Job类。

You cannot delay #save on ActiveRecord models since DJ will attempt to reload the model from the database before performing your action. All of the data will be lost. Instead, create a Job class with a #perform method that creates the User.

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