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-rw-r--r--oslo_db/exception.py2
-rw-r--r--oslo_db/tests/sqlalchemy/test_utils.py2
2 files changed, 3 insertions, 1 deletions
diff --git a/oslo_db/exception.py b/oslo_db/exception.py
index 7637a0d..715bbc1 100644
--- a/oslo_db/exception.py
+++ b/oslo_db/exception.py
@@ -184,7 +184,7 @@ class DBDataError(DBError):
class InvalidSortKey(Exception):
"""A sort key destined for database query usage is invalid."""
- def __init__(self, key):
+ def __init__(self, key=None):
super(InvalidSortKey, self).__init__(
_("Sort key supplied is invalid: %s") % key)
self.key = key
diff --git a/oslo_db/tests/sqlalchemy/test_utils.py b/oslo_db/tests/sqlalchemy/test_utils.py
index 4593f6f..405619f 100644
--- a/oslo_db/tests/sqlalchemy/test_utils.py
+++ b/oslo_db/tests/sqlalchemy/test_utils.py
@@ -149,6 +149,8 @@ class TestPaginateQuery(test_base.BaseTestCase):
sort_dirs=['asc', 'desc'])
def test_invalid_sort_key_str(self):
+ self.assertEqual("Sort key supplied is invalid: None",
+ str(exception.InvalidSortKey()))
self.assertEqual("Sort key supplied is invalid: lol",
str(exception.InvalidSortKey("lol")))