当尝试运行依赖Django代码的celery任务时，我似乎遇到了22个问题。

芹菜代码

from __future__ import absolute_import,unicode_literals
import os
from celery import Celery
from django.conf import settings
from celery import shared_task
from celery import task
from letters.send_write_letter_reminders import send_write_letter_reminders

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

app = Celery('app_name')

# 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')

app.conf.timezone = 'Europe/London'
# Load task modules from all registered Django app configs.
app.autodiscover_tasks(settings.INSTALLED_APPS)

@app.task(bind=True,name='send_letter_reminders')
def send_letter_reminders(slug=None):
    send_write_letter_reminders(slug=slug)

我遇到的问题是该行

from letters.send_write_letter_reminders import send_write_letter_reminders

有了它我得到：

django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

应用服务器将无法运行，但是如果没有它，我将得到：

NameError: name 'send_write_letter_reminders' is not defined

很明显，我缺少有关如何同时运行Celery和Django的基本知识，但是我看不到。谁能启发我做错了什么？

更新 我为此提出了一个解决方案，其中涉及将导入移动到celery任务中。我知道这不是最佳做法。也许这可能有助于解释发生了什么。

@app.task(bind=True,name='send_letter_reminders')
def send_letter_reminders(slug=None):
    from letters.send_write_letter_reminders import send_write_letter_reminders
    send_write_letter_reminders.send_write_letter_reminders(slug=slug)