diff --git a/fas/fas/json.py b/fas/fas/json.py
index 54531fa..beae9f4 100644
--- a/fas/fas/json.py
+++ b/fas/fas/json.py
@@ -77,10 +77,10 @@ class SABase(object):
         # pylint: enable-msg=E1101
        
         # Load all the columns from the table
-        for key in self.mapper.props.keys(): # pylint: disable-msg=E1101
-            if isinstance(self.mapper.props[key], # pylint: disable-msg=E1101
-                    sqlalchemy.orm.properties.ColumnProperty):
-                props[key] = getattr(self, key)
+        for column in sqlalchemy.orm.object_mapper(self).iterate_properties:
+            if isinstance(column, sqlalchemy.orm.properties.ColumnProperty):
+                props[column.key] = getattr(self, key)
+
         # Load things that are explicitly listed
         for field in propList:
             props[field] = getattr(self, field)