'Construct a query for this key range without setting the scan direction.
Args:
kind: A string.
keys_only: bool, default False, use keys_only on Query?
Returns:
A datastore.Query instance.'

def make_ascending_datastore_query(self, kind, keys_only=False):

    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(('__key__', datastore.Query.ASCENDING))
    query = self.filter_datastore_query(query)
    return query
