'Update the values for Nova specific quotas
This method returns HTTP 204 (no content) on success.'

@rest_utils.ajax(data_required=True)
def patch(self, request):

    if api.base.is_service_enabled(request, 'compute'):
        disabled_quotas = quotas.get_disabled_quotas(request)
        filtered_quotas = [quota for quota in quotas.NOVA_QUOTA_FIELDS if (quota not in disabled_quotas)]
        request_data = {key: request.DATA.get(key, None) for key in filtered_quotas}
        nova_data = {key: value for (key, value) in request_data.items() if (value is not None)}
        api.nova.default_quota_update(request, **nova_data)
    else:
        raise rest_utils.AjaxError(501, _('Service    Nova    is    disabled.'))
