Django - 从模型中通过芹菜执行任务

In my models.py:

在我的models.py中：

from django.db import models
from core import tasks

class Image(models.Model):
    image     = models.ImageField(upload_to='images/orig')
    thumbnail = models.ImageField(upload_to='images/thumbnails', editable=False)

    def save(self, *args, **kwargs):
       super(Image, self).save(*args, **kwargs)
       tasks.create_thumbnail.delay(self.id)
from django