Adding extra data to Django Rest Framework results for entire result set

Since you seem to be using one of the ListViews from the Rest Framework, you could override the list() method in your class and set new values on the resulting data, like this:

    def list(self, request, *args, **kwargs):
        response = super().list(request, args, kwargs)
        # Add data to response.data Example for your object:
        response.data['10_mi_count'] = 10 # Or wherever you get this values from
        response.data['20_mi_count'] = 30
        response.data['30_mi_count'] = 45
        return response

Notice that your class must inherit the ListModelMixin directly or via a GenericView from the Rest Framework API (http://www.django-rest-framework.org/api-guide/generic-views#listmodelmixin). I really don’t know if it is the right way to do this, but it is a quick fix.

Hope it helps!