classAnalyticsView(GenericAPIView):filterset_class=OrderFilterfilter_backends= [DjangoFilterBackend,SearchFilter]queryset=Order.objects.select_related('delivery','platform')defget(self,request,*args,**kwargs):queryset=self.filter_queryset(self.get_queryset())monthly_data=queryset.annotate(month=TruncMonth('date_of_sale')            ).values('month').annotate(total_quantity=Sum('quantity_sold')            ).order_by('month')data=  [            {'month':item['month'].strftime("%Y-%m"),value_field:item['total_quantity']            }foriteminqueryset        ]returnResponse({'results':data })

defget_filter_form(self,data,view,request):ifnothasattr(view,'get_queryset')ornothasattr(view,'filter_backends'):return# Infer if this is a list view or not.paginator=getattr(view,'paginator',None)ifisinstance(data,list):passelifpaginatorisnotNoneanddataisnotNone:try:paginator.get_results(data)except (TypeError,KeyError):returnelifnotisinstance(data,list):return