- Can pass mapped attributes and column objects as keys

to query.update({}).  [ticket:1262]

- Mapped attributes passed to the values() of an
expression level insert() or update() will use the
keys of the mapped columns, not that of the mapped
attribute.

1 files changed, 7 insertions, 4 deletions

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index b7d4965dd..07df207dd 100644
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -901,6 +901,13 @@ def _labeled(element):
     else:
         return element
 
+def _column_as_key(element):
+    if isinstance(element, basestring):
+        return element
+    if hasattr(element, '__clause_element__'):
+        element = element.__clause_element__()
+    return element.key
+    
 def _literal_as_text(element):
     if hasattr(element, '__clause_element__'):
         return element.__clause_element__()
@@ -3496,10 +3503,6 @@ class _UpdateBase(ClauseElement):
         return s
 
     def _process_colparams(self, parameters):
-
-        if parameters is None:
-            return None
-
         if isinstance(parameters, (list, tuple)):
             pp = {}
             for i, c in enumerate(self.table.c):