Question

我尝试过使用Celery Task＆amp; Django将框架序列化器放在同一个类中，具有多重继承。

from celery import Task
class ReceiveSerializer(Task, serializers.Serializer):
    def run(self, source, *args, **kwargs):
        self.save()
    def save(self, **kwargs):
        # call long running save method

我收到了错误，

  File "<>\serializers.py", line 217, in <module>
    class ReceiveSerializer(Task, serializers.Serializer):
  File "<>\workspace\www\lib\site-packages\celery-3.1.20-py2.7.egg\celery\app\task.py", line 199, in __new_
_
    tasks.register(new(cls, name, bases, attrs))
TypeError: Error when calling the metaclass bases
    metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

save方法必须在db中创建长对象列表（有时超过5分钟）。我不希望用户等待很长时间。有没有办法做到这一点。

Answer 1

可以使用Mixin吗？

class YourMixin:
    # if you want to trigger the task on save:
    def save(self, *args, **kwargs):
        ret = super().save(*args, **kwargs)
        some_task.apply_async((
            self.__class__.__name__,
            self.pk,
        ))
        return ret


@task()
def some_task(model_name, model_id):
    my_model = apps.get_model('django_app_name.{}'.format(model_name))
    obj = my_model.objects.get(pk=model_id)

使用DRF序列化程序的Celery Task类

1 个答案: