models.py 文件源码

def increment_total_steps(self, steps):
        """Increase the value of :py:attr:`total_steps` by the given number and save."""
        # Assume that other processes may be making concurrent changes
        UserTaskStatus.objects.filter(pk=self.id).update(total_steps=F('total_steps') + steps, modified=now())
        self.refresh_from_db(fields={'total_steps', 'modified'})
        if self.parent:
            self.parent.increment_total_steps(steps)  # pylint: disable=no-member