Rails5，ActiveJob rescue_from 不工作

Question

我正在尝试重现此示例代码：https://apidock.com/rails/ActiveJob/Enqueuing/retry_job，但我无法使 rescue_from 在 ActiveJob 中工作

重现步骤

我已经准备了一个测试项目：

• https://github.com/fguillen/TestingActiveJobRescueFrom

预期行为

在这份工作中：

• https://github.com/fguillen/TestingActiveJobRescueFrom/blob/master/app/jobs/test_job_job.rb

我希望在执行作业时看到rescue_from 消息：

irb(main):005:0> TestJobJob.perform_now

实际行为

我看到的不是消息，而是传播了异常：

irb(main):004:0> TestJobJob.perform_now
Performing TestJobJob from Async(default)
Performed TestJobJob from Async(default) in 0.82ms
Exception: This is the error message
    from /Users/fguillen/Development/Temp/TestingActiveJobRescueFrom/app/jobs/test_job_job.rb:9:in `perform'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activejob-5.0.2/lib/active_job/execution.rb:34:in `block in perform_now'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/callbacks.rb:126:in `call'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/callbacks.rb:455:in `call'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/callbacks.rb:448:in `block (2 levels) in around'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.2/lib/active_support/callbacks.rb:286:in `block (2 levels) in halting'
    from /Users/fguillen/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/i18n-0.8.1/lib/i18n.rb:257:in `with_locale'

当我尝试在测试中重现问题时，行为相同：

• https://github.com/fguillen/TestingActiveJobRescueFrom/blob/master/test/jobs/test_job_job_test.rb

系统配置

Rails 版本：5.0.2 Ruby 版本：2.3.1p112

Answer 1

与实际捕获任何Exception 的ActionController::Base.rescue_from 行为相反：

class MyTestsController < ApplicationController
  rescue_from Exception do |exception|
    render plain: "Rescuing the exception: '#{exception}'", status: 500
  end

  def raise_exception
    raise Exception.new("This is an Exception")
  end

  def raise_standard_error
    raise StandardError.new("This is an StandardError")
  end
end

Example code

ActiveJob::Base.rescue_from 只捕获从StandardError 继承的类：

class TestJob2Job < ApplicationJob
  rescue_from Exception do |exception|
    Rails.logger.info "I am on rescue_from: #{exception}"
  end

  def perform(*args)
    raise StandardError.new("This is the error message")
  end
end

Example code

您可以在此处查看与维护者的对话：https://github.com/rails/rails/issues/28874#issuecomment-297599254