现在如何执行后台工作？ [英] How to perform a background job now?

问题描述

我想在后台执行此操作

Product.all.map { |product| product.save }

当我保存产品时，将调用回调函数以在表中创建新记录用产品成本

When I save the product will call a callback to create a new record in a table with the costs of products

我为此创建了一个作业，但是如果执行 perform_now ，则不会执行该作业后台和 perform_later 会执行很长时间。

I create a job for this, but if I execute perform_now it is not executed on background and perform_later executes long after.

我现在想在后台执行此操作。我不确定是否也可以在线程中执行此操作。

I want to execute this right now but in background. I'm not sure if I can just execute this in a thread too.

我正在使用延迟作业，这是作业

I am using Delayed Job, here is the job

class UpdateProductCostsJob < ApplicationJob
  queue_as :default

  def perform
    Product.all.map { |product| product.save }
  end
end

我想每次执行此模型已保存

And I want to execute every time this model is saved

class CostComposition < ApplicationRecord
  before_save :update_product_costs

  private

    def update_product_costs
      UpdateProductCostsJob.perform_now
    end
end

推荐答案

假设您正在使用rails 5，则可以创建一个高优先级队列并创建该队列下的工作。如果只有一个队列，则可以将作业添加到队列中，并指定要处理该作业的时间。

Assuming that you are using rails 5, you can create a high priority queue and create the job under that queue. If you have only one queue, you can add the job to the queue as well as specify the time when you want to process that job.

UpdateProductCostJob.set(wait_until: Time.now + 5.minutes).perform_later

参考< a href = http://edgeguides.rubyonrails.org/active_job_basics.html#enqueue-the-job rel = nofollow noreferrer> http://edgeguides.rubyonrails.org/active_job_basics.html#enqueue-the-job

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