class OrderSerializer(serializers.ModelSerializer):
    items_details = serializers.SerializerMethodField()

    class Meta:
        model = Order
        fields = ['user', 'items_details']

    def get_items_details(self, obj):
        return {item.id: item.name for item in obj.items.all()}

from django.utils.crypto import get_random_string

target = get_random_string(length=16, allowed_chars="가나다라마바사thankyousomuch")

access_token = openapi.Parameter('access_token', openapi.IN_QUERY, description="Send it to me from Frontend", required=True, type=openapi.TYPE_STRING)
@swagger_auto_schema(operation_description="프론트엔드(POSTMAN) 토큰 전달", responses={200: 'Success'}, manual_parameters=[access_token])

from django.http import JsonResponse


class HealthCheckMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        if request.path == '/health/' or request.path == '/health':
            return JsonResponse({"status": "ok"}, status=200)
        return self.get_response(request)

# config/settings.py
INSTALLED_APPS = ['celery',]

CELERY_TIMEZONE = TIME_ZONE
CELERY_TASK_TRACK_STARTED = True
CELERY_TASK_TIME_LIMIT = 30 * 60
# CELERY_BROKER_URL = os.environ.get("CELERY_BROKER", "redis://redis:6379/0")
# CELERY_RESULT_BACKEND = os.environ.get("CELERY_BACKEND", "redis://redis:6379/0")
CELERY_BROKER_URL="amqp://guest:guest@rabbitmq:5672//"
# CELERY_RESULT_BACKEND = 'django-db'

# config/celery.py
import os

from celery import Celery


os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
app = Celery("config")
app.config_from_object('django.conf:settings', namespace='CELERY')
app.autodiscover_tasks()

# config/__init__.py
from .celery import app as celery_app


__all__ = ['celery_app']

# app/tasks.py
from config.celery import app

from .models import Delivery


@app.task
def process_delivery_task(delivery_id):
    instance = Delivery.objects.get(id=delivery_id)
    instance.status = "2" # 배송 완료
    instance.save()

# app/views.py
class DeliveryViewSet(viewsets.ModelViewSet):
    queryset = Delivery.objects.all()
    serializer_class = DeliverySerializer
    permission_classes = [permissions.IsAuthenticated]
    authentication_classes = [JWTAuthentication]

    @action(detail=True, methods=['GET'], name='departure')
    def departure(self, request, pk=None):
        instance = self.get_object()
        if instance.status == '2':
            return JsonResponse({'message': f'{instance.receiver.kakao_id} 고객님의 상품은 이미 배송이 완료 되었습니다.'})
        instance.status = '1'
        instance.save()

        process_delivery_task.s(delivery_id=instance.id).apply_async(countdown=60)

        return JsonResponse({'message': f'{instance.receiver.kakao_id} 고객님의 상품 {instance.order.item.name} 배송이 출발하였습니다. the delivery service will arrive in 60 seconds'})