vintasoftware/django-ai-plugins/django-celery-expert

# tasks.py
from celery import shared_task
from django.core.mail import send_mail
@shared_task(bind=True, max_retries=3)
def send_welcome_email(self, user_id):
    from users.models import User
    try:
        user = User.objects.get(id=user_id)
        send_mail(
            subject="Welcome!",
            message=f"Hi {user.name}, welcome to our platform!",
            from_email="noreply@example.com",
            recipient_list=[user.email],
        )
    except User.DoesNotExist:
        pass
    except Exception as exc:
        raise self.retry(exc=exc, countdown=60 * (2 ** self.request.retries))
# views.py — queue only after the transaction commits
from django.db import transaction
def register(request):
    user = User.objects.create(...)
    transaction.on_commit(lambda: send_welcome_email.delay(user.id))
    return redirect("dashboard")

@shared_task(bind=True)
def import_csv(self, file_path, total_rows):
    from myapp.models import Record
    with open(file_path) as f:
        reader = csv.DictReader(f)
        for i, row in enumerate(reader):
            Record.objects.create(**row)
            if i % 100 == 0:
                self.update_state(
                    state="PROGRESS",
                    meta={"current": i, "total": total_rows},
                )
    return {"status": "complete", "processed": total_rows}
# Poll progress
result = import_csv.AsyncResult(task_id)
if result.state == "PROGRESS":
    progress = result.info.get("current", 0) / result.info.get("total", 1)

from celery import chain
@shared_task
def validate_inventory(order_id):
    order = Order.objects.get(id=order_id)
    if not order.items_in_stock():
        raise ValueError("Items out of stock")
    return order_id
@shared_task
def charge_payment(order_id):
    order = Order.objects.get(id=order_id)
    order.charge()
    return order_id
@shared_task
def send_confirmation(order_id):
    Order.objects.get(id=order_id).send_confirmation_email()
def process_order(order_id):
    chain(
        validate_inventory.s(order_id),
        charge_payment.s(),
        send_confirmation.s(),
    ).delay()