使延迟的作业在特定日期时间运行

本文介绍了使延迟的作业在特定日期时间运行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想通过 delayed_job

发送一些电子邮件，但是我想在事件。

However, I want to send them before and after an event.

我担心的是这是否真的有效：

My concern is if this will actually work:

def one_week_before_run AtendeeMailer.delay(run_at: '8th October 2016'.to_datetime).mudrun_about_to_start(self) end def thank_you_note AtendeeMailer.delay(run_at: '18th October 2016'.to_datetime.end_of_day).thank_you(self) end

或我应该选择另一种方法吗？

or should I choose another approach?

推荐答案

仅当run_at< =当前时间时，延迟的作业才会选择要执行的作业。引用DJ的查询来选择工作

Delayed job picks a job to execute only if the run_at <= current time. Refer DJ's query to pick job

SELECT `delayed_jobs`.* FROM `delayed_jobs` WHERE ((run_at <= '2016-09-27 00:49:59' AND (locked_at IS NULL OR locked_at < '2016-09-27 00:24:59') OR locked_by = 'host:Madhubalans-Air pid:74314') AND failed_at IS NULL) ORDER BY priority ASC, run_at ASC LIMIT 1

您的代码将run_at设置为2016-10-18 00 ：00：00和2016-10-18 23:59:59。 因此，您的代码将按您的期望运行：）

Your code is setting run_at to 2016-10-18 00:00:00 and 2016-10-18 23:59:59. So your code will work as per your expectation :)