models.py 文件源码

def add_to_queue(self, url=None, target_state='queued', countdown=0):
        """
        Adds job to task queue and transactionally updates state to 'queued'
        and saves job.
        Does nothing if state is not 'scheduled'.
        """
        if self.state != 'scheduled':
            logging.warn('tried to add job {} with state {}, to queue, '
                         'doing nothing'.format(self.key, self.state))
            return
        if url is None:
            url = self.queue_url
        logging.debug(u'scheduling job {} for {}'.format(self.key,
                                                        self.user_email))
        taskqueue.add(url=url,
                      payload=json.dumps({'key': self.key.urlsafe()}),
                      queue_name=self.queue_name,
                      countdown=countdown,
                      transactional=True)
        self.state = target_state
        self.put()