Fixed bug where in Py2K a unicode literal would not be accepted

as the string name of a class or other argument within
declarative using :func:`.relationship`.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/ext/declarative/clsregistry.py b/lib/sqlalchemy/ext/declarative/clsregistry.py
index a669e37f4..8fef8f1bc 100644
--- a/lib/sqlalchemy/ext/declarative/clsregistry.py
+++ b/lib/sqlalchemy/ext/declarative/clsregistry.py
@@ -277,7 +277,7 @@ def _deferred_relationship(cls, prop):
         for attr in ('argument', 'order_by', 'primaryjoin', 'secondaryjoin',
                      'secondary', '_user_defined_foreign_keys', 'remote_side'):
             v = getattr(prop, attr)
-            if isinstance(v, str):
+            if isinstance(v, util.string_types):
                 setattr(prop, attr, resolve_arg(v))
 
         if prop.backref and isinstance(prop.backref, tuple):