Django和Celery - ModuleNotFoundError:没有名为'celery.task‘的模块

Question

我想使用Celery在Django中启动一个定期任务。以下是我的项目的相关部分：

# celery.py

from celery import Celery

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'bookProjectSetting.settings')

app = Celery('bookProjectSetting')

# Using a string here means the worker doesn't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
#   should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')

# Load task modules from all registered Django app configs.
app.autodiscover_tasks()


@app.task(bind=True)
def debug_task(self):
    print(f'Request: {self.request!r}')

__init__.py如下所示：

# This will make sure the app is always imported when
# Django starts so that shared_task will use this app.
from .celery import app as celery_app

__all__ = ('celery_app',)

我的books应用程序文件夹中的tasks.py文件如下所示：

from books.models import Book
from celery.schedules import crontab
from celery.decorators import periodic_task

@periodic_task(
    run_every=(crontab(minute='*/10')), 
    name="update_life_time_of_books", 
    ignore_result=True)
def update_life_time_of_books():
   # do sth. 

我还将redis设置为代理，并安装了django-celery-beat内容。但是当我通过以下命令运行worker时：

celery -A bookProjectSetting beat -l INFO --scheduler django_celery_beat.schedulers:DatabaseScheduler

然后我得到以下错误：

File "/home/ac3l1k/Desktop/PROJECT/simpleDjangoProjects/bookProject/env/lib/python3.8/site-packages/celery/local.py", line 403, in _compat_periodic_task_decorator
    from celery.task import periodic_task
ModuleNotFoundError: No module named 'celery.task'

从错误中，我假设装饰器出了问题，但我不知道为什么。希望有人能帮上忙。

Thnks in advance :=)

注意:以下是我的requirements.txt文件的内容，供版本参考

$ pip freeze

amqp==5.0.1
asgiref==3.2.10
billiard==3.6.3.0
celery==5.0.1
click==7.1.2
click-didyoumean==0.0.3
click-repl==0.1.6
Django==3.1.2
django-celery-beat==2.1.0
django-timezone-field==4.0
djangorestframework==3.12.1
kombu==5.0.2
prompt-toolkit==3.0.8
python-crontab==2.5.1
python-dateutil==2.8.1
pytz==2020.1
redis==3.5.3
six==1.15.0
sqlparse==0.4.1
vine==5.0.0
wcwidth==0.2.5

Answer 1

"task“不再是5.x版本，您可以使用4.x版本

• pip3卸载celery
• pip3安装celery==4.4.2

编辑了空间

Answer 2

根据我对这个问题的理解，他们弃用了这个功能：https://github.com/celery/celery/issues/6406

现在，您似乎需要使用它来制定计划任务：

https://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html?highlight=periodic