How to get query parameter through form-data postman in django

Question

I have this viewset which should return certian results when i give query param week, month or year.

class TotalOrdersViewset(viewsets.ModelViewSet):
    queryset = Order.objects.all()
    serializer_class = OrderSerializer
    def list(self, request, *args, **kwargs):
        try:
            type = request.data.get('type')
            print('type= '+str(type))
            if type is None:
                return Response({"success": False, "message": "type param describing month or week is missing."}, status=400)
            if type == 'month':
                qs = Order.objects.filter(date__month=datetime.now().month).count()
                return Response({'Number of orders this month': qs})
            elif type == 'year':
                qs = Order.objects.filter(date__year=datetime.now().year).count()
                return Response({'Number of orders this year': qs})
            elif type == 'week':
                TODAY = date.today()
                start = TODAY - timedelta(days=TODAY.weekday())
                end = start + timedelta(days=6)
                qs = Order.objects.filter(date__range=(start, end)).count()
                return Response({'Number of order this week': qs})
            else:
                return Response({})
        except Exception as e:
            return Response({'error':str(e)})

I am specifying parameter but request.data.get is not accessing it.

I have also tried request.session.get and request.POST.get.

Can somebody tell me where I am wrong?

Answer 1

After doing some research and trying different things I got answer.

We need to use viewsets.ViewSet instead of viewsets.ModelViewSet.

Then we will request query_params

At last the code will look like:

class TotalOrdersViewset(viewsets.ViewSet):
    serializer_class = OrderSerializer
    def list(self, request):
        try:
            params = self.request.query_params
            type = params.get('type')
            print('type = '+str(type))
            if type is None:
                return Response({"success": False, "message": "type param describing week, month or year is missing."}, status=400)
            elif type == 'month':
                qs = Order.objects.filter(date__month=datetime.now().month).count()
                return Response({'Number of orders this month': qs})
            elif type == 'year':
                qs = Order.objects.filter(date__year=datetime.now().year).count()
                return Response({'Number of orders this year': qs})
            elif type == 'week':
                TODAY = date.today()
                start = TODAY - timedelta(days=TODAY.weekday())
                end = start + timedelta(days=6)
                qs = Order.objects.filter(date__range=(start, end)).count()
                return Response({'Number of order this week': qs})
            else:
                return Response({})
        except Exception as e:
            return Response({'error':str(e)})

In postman we will enter type in Params as shown in following image.