Django-使用选项但不使用函数参数执行Celery任务

Question

I'm using Celery for the first time. Looking at the documentation, it seems like I've tried everything to properly execute the task using apply_async. I'm calling the task from a signal method so it's in signals.py.

signals.py

from django.db.models.signals import post_save
from django.dispatch import receiver
from datetime import datetime, timedelta

from games.models import Game
from contacts.models import Contact
from msgs.models import SMS
from msgs.tasks import sendSMS_Scheduled


@receiver(post_save, sender=Game)
def createSMS(sender, instance, created, **kwargs):

    if created:

        contacts = Contact.objects.all()
        body = SMS.defaultMessageBuilder(
            location=instance.location,
            time=instance.schedStart
        )
        eta = instance.schedStart - timedelta(hours=7)
        expire = instance.schedStart
        result = sendSMS_Scheduled.apply_async(eta=eta, expires=expire)

tasks.py

from celery import shared_task
from SMSerSite.celery import app
from contacts.models import Contact

from .models import SMS

@shared_task(name='SMSerSite.msgs.tasks.sendSMS', bind=True)
def sendSMS_Scheduled():

    messages = self.request.sms_set.all()

    SMS.sendSMS(messages)

When the code runs, I get an error: sendSMS_Scheduled() takes 0 positional arguments but 1 was given . I've tried various ways of writing the line where I call the task using apply_async but nothing works. What am I getting wrong here?

Answer 1

When you use the bind=True keyword argument, your task gets a reference to itself, so change your method signature to:

def sendSMS_Scheduled(self):

As a side note, keep in mind that self in this context is the actual celery task. You have a line self.request.sms_set.all() which makes me think you are expecting self to be something django specific.