def get(self, id, pk='id', deleted=False):
        try:
            if pk == 'id':
                id = int(id)
            if deleted:
                spec = {pk: id}
            else:
                spec = {pk: id, 'data': {'$exists': 1}}
            fields = {'_id': 0}
            row = self.db.docs.find_one(spec, fields)
        except Exception as e:
            raise DatabaseException(e)
        if row:
            return Document(**row)
        raise NotFoundError('%s %s not found' % (pk, id))
def list_query_results_for_subscription(
        self,
        query_options: Optional["_models.QueryOptions"] = None,
        **kwargs: Any
    ) -> AsyncIterable["_models.PolicyTrackedResourcesQueryResults"]:
        """Queries policy tracked resources under the subscription.

        :param query_options: Parameter group.
        :type query_options: ~azure.mgmt.policyinsights.models.QueryOptions
        :keyword callable cls: A custom type or function that will be passed the direct response
        :return: An iterator like instance of either PolicyTrackedResourcesQueryResults or the result of cls(response)
        :rtype: ~azure.core.async_paging.AsyncItemPaged[~azure.mgmt.policyinsights.models.PolicyTrackedResourcesQueryResults]
        :raises: ~azure.core.exceptions.HttpResponseError
        """
        cls = kwargs.pop('cls', None)  # type: ClsType["_models.PolicyTrackedResourcesQueryResults"]
        error_map = {
            401: ClientAuthenticationError, 404: ResourceNotFoundError, 409: ResourceExistsError
        }
        error_map.update(kwargs.pop('error_map', {}))