我按照this tutorial尝试使用我的Django项目运行定期任务。
使用以下命令运行芹菜时:
celery -A proj beat -l info -S django
我收到以下错误:
celery beat v4.0.2 (latentcall) is starting.
__ - ... __ - _
LocalTime -> 2018-02-24 13:42:37
Configuration ->
. broker -> redis://localhost:6379//
. loader -> celery.loaders.app.AppLoader
. scheduler -> django_celery_beat.schedulers.DatabaseScheduler
. logfile -> [stderr]@%INFO
. maxinterval -> 5.00 seconds (5s)
[2018-02-24 13:42:37,244: INFO/MainProcess] beat: Starting...
[2018-02-24 13:42:37,245: INFO/MainProcess] Writing entries...
[2018-02-24 13:42:37,255: CRITICAL/MainProcess] beat raised exception <type 'exceptions.AttributeError'>: AttributeError("'NoneType' object has no attribute 'localize'",)
Traceback (most recent call last):
File "...lib/python2.7/site-packages/celery/apps/beat.py", line 107, in start_scheduler
service.start()
File "...lib/python2.7/site-packages/celery/beat.py", line 528, in start
humanize_seconds(self.scheduler.max_interval))
File "...lib/python2.7/site-packages/kombu/utils/objects.py", line 44, in __get__
value = obj.__dict__[self.__name__] = self.__get(obj)
File "...lib/python2.7/site-packages/celery/beat.py", line 572, in scheduler
return self.get_scheduler()
File "...lib/python2.7/site-packages/celery/beat.py", line 567, in get_scheduler
lazy=lazy,
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 183, in __init__
Scheduler.__init__(self, *args, **kwargs)
File "...lib/python2.7/site-packages/celery/beat.py", line 204, in __init__
self.setup_schedule()
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 191, in setup_schedule
self.install_default_entries(self.schedule)
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 290, in schedule
self._schedule = self.all_as_schedule()
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 199, in all_as_schedule
s[model.name] = self.Entry(model, app=self.app)
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 88, in __init__
model.last_run_at = self._default_now()
File "...lib/python2.7/site-packages/django_celery_beat/schedulers.py", line 106, in _default_now
return now.tzinfo.localize(now.replace(tzinfo=None))
AttributeError: 'NoneType' object has no attribute 'localize'
研究其他StackOverflow帖子表明某个对象没有通过导致NoneType属性错误的地方传递。我怀疑这个问题可能与我的嵌套local.py和production.py设置模块有关,这些模块与Celery对项目应用程序目录中更典型的设置模块的期望不同。
以下是我的项目结构和代码。我的virtualenv已启用,所有依赖项已安装并正在运行。任何帮助或建议将不胜感激。
目录结构:
├── myproject
│ ├── myproject
│ │ ├── __init__.py
│ │ ├── settings
│ │ │ ├── __init__.py
│ │ │ ├── base.py
│ │ │ ├── celery.py
│ │ │ ├── local.py
│ │ │ ├── production.py
│ ├── manage.py
的myproject / myproject的/设置/ __初始化__。PY
# myproject/myproject/settings/__init__.py
from __future__ import absolute_import, unicode_literals
from .base import *
try:
from .local import *
live = False
except:
live = True
if live:
from .production import *
的myproject / myproject的/ __初始化__。PY
# myproject/myproject/__init__.py
from __future__ import absolute_import
from myproject.settings.celery import app as celery_app
celery.py
# myproject/myproject/settings/celery.py
from __future__ import absolute_import, unicode_literals
import os
from celery import Celery
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings.local')
app = Celery('myproject')
# Using a string here means the worker don'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('Request: {0!r}'.format(self.request))
from celery.schedules import crontab
app.conf.beat_schedule = {
'add-every-minute-crontab': {
'task': 'fetch_news',
'schedule': crontab()
}
}
答案 0 :(得分:0)
我通过添加设置成功克服了这个问题:
DJANGO_CELERY_BEAT_TZ_AWARE=False
然后,我有一个例外
kombu.exceptions.VersionMismatch: Redis transport requires redis-py versions
此问题由https://github.com/celery/celery/issues/5369#issuecomment-469302960
解决我还注意到django-celery-beat 1.1.0版没有此特定问题,但是它将不使用crontabs发送信号。因此,您应该使用更高的版本。