class ModelsAndTypesViewSet(generics.ListAPIView):
    serializer_class = serializers.ModelSerializer

    def get_queryset(self):
        return list(itertools.chain(Types.objects.all(), HardwareModel.objects.all()))

router = routers.DefaultRouter()

router.register('modelstypes', views.ModelsAndTypesViewSet.as_view(), base_name='modelstypes')
router.register('manufacturers', views.HardwareManufacturerViewSet)
router.register('types', views.TypesViewSet)
router.register('models', views.HardwareModelViewSet)
router.register('hardware', views.HardwareViewSet)


urlpatterns = router.urls