芹菜任务不会在 django 中执行

Question

我正在以 django 3 为例来学习 Django。我想用芹菜启动异步任务。我设置了设置，但任务不会执行。 我使用rabbit mq 作为代理，我使用的是windows。 这是我的代码：

芹菜.py

import os
from celery import Celery

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

app = Celery('Onlineshop')

app.config_from_object('django.conf:settings', namespace='CELERY')
app.autodiscover_tasks()

初始化.py

from .celery import app as celery_app

__all__ = ('celery_app',)

tasks.py

from celery import shared_task
from django.core.mail import send_mail
from .models import Order


@shared_task
def order_created(order_id):
    """Task to send an e-mail notification when order is successfully created."""
    order = Order.objects.get(id=order_id)
    subject = f'Order nr. {order.id}'
    message = f'Dear {order.first_name},\n\n' \
              f' You have successfully placed an order.' \
              f'Your order ID is {order.id}'

    mail_sent = send_mail(subject, message, 'admin@onlineshop.com', [order.email])
    return mail_sent

views.py

from django.contrib.auth.decorators import login_required
from django.shortcuts import render
from .models import OrderItem
from .forms import OrderCreateForm
from cart.cart import Cart
from .tasks import order_created


# Create your views here.
@login_required
def order_create(request):
    cart = Cart(request)
    if request.method == 'POST':
        user = request.user
        form = OrderCreateForm(request.POST)
        if form.is_valid():
            order = form.save(commit=False)
            order.user = user
            order.save()
            for item in cart:
                OrderItem.objects.create(order=order, product=item['product'], price=item['price'],
                                         quantity=item['quantity'])
            context = {
                'order': order,
            }
            # clear the cart
            cart.clear()
            # launch asynchronous task
            order_created.delay(order.id)
            return render(request, 'order/created.html', context)
    else:
        form = OrderCreateForm()
    context = {'cart': cart,
               'form': form,
               }
    return render(request, 'order/create.html', context)

这是我认为的问题，我调用了 order_created 函数，但任务不会执行，并且我的控制台中没有电子邮件。 我的电子邮件设置是正确的，因为我的应用程序中的其他电子邮件有效。 我使用花来监控 celery，在花面板中显示任务正在执行但没有电子邮件。 如果有任何机构可以提供帮助，我会很高兴

Answer 1

好的，通过运行命令 Rabbitmq-server restart 并通过运行命令 Celery -A app_name worker --loglevel=info 让 celery 连接到服务器。试试这个任务调度器

@shared_task
def order_created(order_id):
    """ Task to send an e-mail notification when an order is successfully created"""
    order = Order.objects.get(id=order_id)
    subject = 'Order nr. {}'.format(order.id)
    message = 'Dear {},\n\nYou have sucsessfully placed an order. Your order id is {}'\
                  .format(order.first_name,order.id)
    
    mail_sent = send_mail(subject,
                           message,
                           'admin@onlineshop.com',
                            [order.email])
    
    return mail_sent