Django Rest Framework, passing parameters with GET request, classed based views

Question

I would like a user to send a GET request to my Django REST API:

127.0.0.1:8000/model/?radius=5&longitude=50&latitude=55.1214

with his longitude/latitude and radius, passed in parameters, and get the queryset using GeoDjango.

For example, currently I have:

class ModelViewSet(viewsets.ModelViewSet):
    queryset = Model.objects.all()

And what I ideally want is:

class ModelViewSet(viewsets.ModelViewSet):
     radius = request.data['radius']
     location = Point(request.data['longitude'],request.data['latitude']
     # filter results by distance using geodjango
     queryset = Model.objects.filer(location__distance_lte=(location, D(m=distance))).distance(location).order_by('distance')

Now a couple of immediate errors:

1) request is not defined - should I use api_view, i.e. the function based view for this?

2) DRF page says that request.data is for POST, PUT and PATCH methods only. How can send parameters with GET?

Answer 1

You can override get_queryset method for that purpose. As for query string parameters, you are right, request.data holds POST data, you can get query string params through request.query_params

def get_queryset(self):
    longitude = self.request.query_params.get('longitude')
    latitude= self.request.query_params.get('latitude')
    radius = self.request.query_params.get('radius')

    location = Point(longitude, latitude)

    queryset = Model.objects.filter(location__distance_lte=(location, D(m=distance))).distance(location).order_by('distance')

    return queryset