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Celery task will not execute in django

I am leraning Django using django 3 by example. I want to launch asynchronous task with celery. I set the settings but the task will not execute. i'm using rabbit mq as broker and i'm using windows. Here is my code:

celery.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()

init .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)

Here is the problem in my view i called order_created function but the task will not execute and there in no email in my console. my email settings are correct because other emails in my app works. I use flower to monitor celery and in flower panel it shows that the tasks are executing but there is no email. i would be happy if any body can help

Okay by running the command Rabbitmq-server restart and also to get celery to connect to the server by running the command Celery -A app_name worker --loglevel=info.

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