Question

我正在使用《 Django 2 by Example》一书中的代码示例来建立我的电子商务商店。该视图可以正常工作，但是任务从未执行过。没有错误。页面冻结在“等待本地主机...”上。我在代码中做错了什么？

views.py

   import ...
   from .tasks import order_created

        def order_create(request):
            cart = Cart(request)
            if request.method == 'POST':
                form = OrderCreateForm(request.POST)

                if form.is_valid():
                    order = form.save(commit=False)
                    if cart.promo_code:
                        order.promo_code = cart.promo_code
                        order.discount = cart.promo_code.discount
                    order.save()

                    for item in cart:
                        OrderItem.objects.create(order=order,
                                                 book=item['book'],
                                                 price=item['price'],
                                                 quantity=item['quantity'])
                    # clear the cart
                    cart.clear()
                    print("clean cart")
                    # set the order in the session
                    request.session['order_id'] = order.id
                    print("id  - check")
                    # launch asynchronous task
                    order_created.delay(order.id) # here I stuck
                    print("clean cart")
                    # redirect for payment
                    return redirect(reverse('payment:process'))
            else:
                form = OrderCreateForm()
            return render(request,
                          'orders/order/create.html',
                          {'cart': cart, 'form': form})

tasks.py

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


@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 successfully placed an order.\
                  Your order id is {}.'.format(order.first_name,
                                               order.id)
    mail_sent = send_mail(subject,
                          message,
                          'archeski.dk@gmail.com',
                          [order.email])
    return mail_sent

我正在使用 celery==4.2.0 Django==2.0.7 Ubuntu 18.04

更新：在 celery.py 中添加了这两行代码。而且冻结已经消失，订单页面现在将我重定向到进一步的付款程序。但是任务order_created仍未运行。

  app.conf.broker_url = 'redis://localhost:6379/1'
    # app.conf.broker_transport_options = {'visibility_timeout': 3600}  # 1 hour.
    app.config_from_object('django.conf:settings', namespace='CELERY')

$ redis-cli MONITOR

输出以下内容：

OK
1531137225.134559 [1 127.0.0.1:48116] "ZREVRANGE" "book:1:purchased_with" "0" "-1"
1531137240.820217 [1 127.0.0.1:48130] "LPUSH" "celery" "{\"body\": \"W1szMV0sIHt9LCB7ImNhbGxiYWNrcyI6IG51bGwsICJlcnJiYWNrcyI6IG51bGwsICJjaGFpbiI6IG51bGwsICJjaG9yZCI6IG51bGx9XQ==\", \"content-encoding\": \"utf-8\", \"content-type\": \"application/json\", \"headers\": {\"lang\": \"py\", \"task\": \"orders.tasks.order_created\", \"id\": \"172d5ec0-9b53-4766-bc04-470631a3a8e4\", \"shadow\": null, \"eta\": null, \"expires\": null, \"group\": null, \"retries\": 0, \"timelimit\": [null, null], \"root_id\": \"172d5ec0-9b53-4766-bc04-470631a3a8e4\", \"parent_id\": null, \"argsrepr\": \"(31,)\", \"kwargsrepr\": \"{}\", \"origin\": \"gen24500@archeski-Inspiron-5558\"}, \"properties\": {\"correlation_id\": \"172d5ec0-9b53-4766-bc04-470631a3a8e4\", \"reply_to\": \"b8b0c8bb-1931-3be2-a044-d588d95c2fe9\", \"delivery_mode\": 2, \"delivery_info\": {\"exchange\": \"\", \"routing_key\": \"celery\"}, \"priority\": 0, \"body_encoding\": \"base64\", \"delivery_tag\": \"249e3deb-489b-4e0b-bde7-54160d3ccaaf\"}}"
1531137464.423873 [0 127.0.0.1:48192] "SELECT" "1"
1531137464.424085 [1 127.0.0.1:48192] "ZREVRANGE" "book:1:purchased_with" "0" "-1"
1531137479.993181 [0 127.0.0.1:48198] "SELECT" "1"
1531137479.993295 [1 127.0.0.1:48198] "PING"
1531137479.994161 [0 127.0.0.1:48200] "SELECT" "1"
1531137479.994260 [1 127.0.0.1:48200] "MULTI"
1531137479.994279 [1 127.0.0.1:48200] "LLEN" "celery"
1531137479.994286 [1 127.0.0.1:48200] "LLEN" "celery\x06\x163"
1531137479.994291 [1 127.0.0.1:48200] "LLEN" "celery\x06\x166"
1531137479.994295 [1 127.0.0.1:48200] "LLEN" "celery\x06\x169"
1531137479.994299 [1 127.0.0.1:48200] "EXEC"
1531137479.994618 [1 127.0.0.1:48200] "SADD" "_kombu.binding.celery" "celery\x06\x16\x06\x16celery"
1531137479.994977 [1 127.0.0.1:48200] "LPUSH" "celery" "{\"body\": \"W1szMl0sIHt9LCB7ImNhbGxiYWNrcyI6IG51bGwsICJlcnJiYWNrcyI6IG51bGwsICJjaGFpbiI6IG51bGwsICJjaG9yZCI6IG51bGx9XQ==\", \"content-encoding\": \"utf-8\", \"content-type\": \"application/json\", \"headers\": {\"lang\": \"py\", \"task\": \"orders.tasks.order_created\", \"id\": \"0fbcecc4-293d-472b-8308-46cb2d9ff345\", \"shadow\": null, \"eta\": null, \"expires\": null, \"group\": null, \"retries\": 0, \"timelimit\": [null, null], \"root_id\": \"0fbcecc4-293d-472b-8308-46cb2d9ff345\", \"parent_id\": null, \"argsrepr\": \"(32,)\", \"kwargsrepr\": \"{}\", \"origin\": \"gen24983@archeski-Inspiron-5558\"}, \"properties\": {\"correlation_id\": \"0fbcecc4-293d-472b-8308-46cb2d9ff345\", \"reply_to\": \"f046e6b8-dd2b-30a4-86a5-0de752377bc7\", \"delivery_mode\": 2, \"delivery_info\": {\"exchange\": \"\", \"routing_key\": \"celery\"}, \"priority\": 0, \"body_encoding\": \"base64\", \"delivery_tag\": \"088bae10-976e-4143-8c28-9ed2e254f2d5\"}}"
1531137480.232213 [1 127.0.0.1:48200] "LPUSH" "celery" "{\"body\": \"W1szM10sIHt9LCB7ImNhbGxiYWNrcyI6IG51bGwsICJlcnJiYWNrcyI6IG51bGwsICJjaGFpbiI6IG51bGwsICJjaG9yZCI6IG51bGx9XQ==\", \"content-encoding\": \"utf-8\", \"content-type\": \"application/json\", \"headers\": {\"lang\": \"py\", \"task\": \"orders.tasks.order_created\", \"id\": \"5aa54a37-95da-43c9-b59e-e6797b7cdd2f\", \"shadow\": null, \"eta\": null, \"expires\": null, \"group\": null, \"retries\": 0, \"timelimit\": [null, null], \"root_id\": \"5aa54a37-95da-43c9-b59e-e6797b7cdd2f\", \"parent_id\": null, \"argsrepr\": \"(33,)\", \"kwargsrepr\": \"{}\", \"origin\": \"gen24983@archeski-Inspiron-5558\"}, \"properties\": {\"correlation_id\": \"5aa54a37-95da-43c9-b59e-e6797b7cdd2f\", \"reply_to\": \"f046e6b8-dd2b-30a4-86a5-0de752377bc7\", \"delivery_mode\": 2, \"delivery_info\": {\"exchange\": \"\", \"routing_key\": \"celery\"}, \"priority\": 0, \"body_encoding\": \"base64\", \"delivery_tag\": \"f78cd769-d7fa-43de-aee9-f7bc5a2c78ac\"}}"

Answer 1

也许这会有所帮助：

您必须更新项目conf文件夹 init .py文件：

from __future__ import absolute_import

# 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

Answer 2

我也在学习芹菜，而且是从两天前开始的。我的经验是，在将芹菜集成到Web应用程序之前，需要独立地对其进行良好部署。

访问芹菜文档页面后，http://docs.celeryproject.org/en/latest/getting-started/first-steps-with-celery.html#first-steps 我已经成功启动了芹菜应用程序。

从最简单的演示开始。愿我的建议对您有帮助。

Answer 3

是否可以像入门指南中所述，再次检查是否已将芹菜应用程序导入__init__.py文件中？ https://docs.celeryproject.org/en/latest/django/first-steps-with-django.html

我遇到了类似的问题，其他所有事物看起来都正确，但是当我使用.delay()

时，任务挂起了

立即添加导入即可解决此问题。

Django：芹菜任务不使用.delay（）执行

3 个答案: