use accepts scalar loader here so we deal with _ProxyImpl correctly

2 files changed, 7 insertions, 7 deletions

diff --git a/lib/sqlalchemy/orm/state.py b/lib/sqlalchemy/orm/state.py
index 2c947a7ac..8d73c9426 100644
--- a/lib/sqlalchemy/orm/state.py
+++ b/lib/sqlalchemy/orm/state.py
@@ -394,12 +394,10 @@ class InstanceState(interfaces._InspectionAttr):
 
     @property
     def _unloaded_non_object(self):
-        return self.unloaded.difference(self._uses_objects)
-
-    @property
-    def _uses_objects(self):
-        return (attr for attr in self.manager
-                    if self.manager[attr].impl.uses_objects)
+        return self.unloaded.intersection(
+                attr for attr in self.manager
+                    if self.manager[attr].impl.accepts_scalar_loader
+            )
 
     @property
     def expired_attributes(self):
diff --git a/test/orm/test_unitofwork.py b/test/orm/test_unitofwork.py
index a0f96838f..67a11e366 100644
--- a/test/orm/test_unitofwork.py
+++ b/test/orm/test_unitofwork.py
@@ -857,9 +857,11 @@ class DefaultTest(fixtures.MappedTest):
         Secondary = self.classes.Secondary
 
         mapper(Hoho, default_t, eager_defaults=True, properties={
-                "sec": relationship(Secondary)
+                "sec": relationship(Secondary),
+                "syn": sa.orm.synonym(default_t.c.counter)
             })
 
+
         mapper(Secondary, self.tables.secondary_table)
         h1 = Hoho()