serializers.py


class PersonaSerializer2(serializers.ModelSerializer):

    activo=serializers.BooleanField(default=False)

    class Meta:
        model=Person
        fields=('__all__')

views.py

class PersonApiLista(ListAPIView):

    #serializer_class= PersonaSerializer
    serializer_class= PersonaSerializer2

    def get_queryset(self):
        return Person.objects.all()

urls.py

    path(
        'api/personas/',
        views.PersonApiLista.as_view(),
        name=''
    ),