Question

我想模仿常见的CMS平台（如Wordpress或Drupal）的“已发布/未发布”功能。

所以我有这个Job（ndb.Model）：

class Job(ndb.Model):
    title = ndb.StringProperty()
    published = ndb.StringProperty(default = "on")
    created = ndb.DateTimeProperty(auto_now_add = True)
    expire = ndb.DateTimeProperty()

NewJob处理程序如下所示：

class NewJob(JobHandler):

    def get(self):
        self.render('new-job.html')

    def post(self):
        title = self.request.get('title')
        published = "on"

        expire = datetime.datetime.now() + datetime.timedelta(days = 30)

        if title:
            j = Job(
                title = title, 
                published = published,
                expire = expire,
                created = created)
            j.put()
            self.redirect('/job/%s' % str(j.key.id()))
        else:
            self.redirect('/login')

保存的实体看起来像这样：

Job(key=Key('Job', 5910974510923776), created=datetime.datetime(2014, 1, 17, 19, 0, 52, 12379), expire=datetime.datetime(2014, 2, 17, 19, 1, 52, 12174), published=u'on', title=u'Sous Chef')

我的目标是将所有Job个实体设置为'发布==“关闭”'当他们expire时间今天（现在）

所以我在cron.yaml

中设置了一个任务

cron: 
- description: expire job entities after 30 days
  url: /cron/job-expire
  schedule: every day 00:00

... /cron/job-expire网址由：

处理

class CronJobExpire(BaseHandler):
    def get(self):
        jobs = Job.query(Job.published == "on").fetch()
        now = datetime.datetime.now()
        for job in jobs:
            if job.expire < now or job.expire == now:
                job.published = "off"

上面CronJobExpire处理程序的目的是：

检查当前published == "on"的作业实体列表检查他们的expire日期是“now”还是“< now”，如果这是真，请设置published == "off"。

这不起作用。我正在关注文档。任何帮助将不胜感激 - 谢谢。

Answer 1

您需要保存更改的作业：

class CronJobExpire(BaseHandler):
    def get(self):
        jobs = Job.query(Job.published == "on").fetch()
        now = datetime.datetime.now()
        for job in jobs:
            if job.expire <= now:
                job.published = "off"    
                job.put()

另外，我建议只获取过期的工作：

now = datetime.datetime.now()    
jobs = Job.query(Job.published == "on", Job.expire <= now).fetch()
for job in jobs:
    job.published = "off"
    job.put()

或者，减少API调用，从而提高速度：

now = datetime.datetime.now()    
jobs = Job.query(Job.published == "on", Job.expire <= now).fetch()
for job in jobs:
    job.published = "off"
ndb.put_multi(jobs)

最后，考虑将Job.published设为布尔值：

published = ndb.BooleanProperty(default=True)

Google App Engine：使用cron过期（或取消发布＆＃39;）实体

1 个答案: