srvTest/basic/views.py

from django.db.models import Sum
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework.viewsets import ModelViewSet

from basic.models import Menu
from basic.serializer import MenuSerializer
from payment.models import Payment


class MenuView(ModelViewSet):
    queryset = Menu.objects.all()
    serializer_class = MenuSerializer
    pagination_class = None
    filter_fields = {'code': ['exact'], 'parent': ['exact']}


class StatisticsView(APIView):
    def get(self, request):
        data = list(
            Payment.objects.values('payment_type').annotate(price_sum=Sum('index_price')).order_by('-price_sum'))
        return Response(data, status=status.HTTP_200_OK)