- Column with no name (as in declarative) won't raise a

NoneType error when it's string output is requsted
(such as in a stack trace).

2 files changed, 9 insertions, 1 deletions

diff --git a/lib/sqlalchemy/ext/declarative.py b/lib/sqlalchemy/ext/declarative.py
index a5cb6e9d2..70f50622d 100644
--- a/lib/sqlalchemy/ext/declarative.py
+++ b/lib/sqlalchemy/ext/declarative.py
@@ -737,3 +737,4 @@ def _undefer_column_name(key, column):
         column.key = key
     if column.name is None:
         column.name = key
+    util.reset_memoized(column, 'description')
\ No newline at end of file
diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py
index b8a36ebb5..792a7e923 100644
--- a/lib/sqlalchemy/schema.py
+++ b/lib/sqlalchemy/schema.py
@@ -617,9 +617,16 @@ class Column(SchemaItem, expression.ColumnClause):
         else:
             return self.description
 
+    @util.memoized_property
+    def description(self):
+        if not self.name:
+            return "(no name)"
+        else:
+            return self.name.encode('ascii', 'backslashreplace')
+
+    @property
     def bind(self):
         return self.table.bind
-    bind = property(bind)
 
     def references(self, column):
         """Return True if this Column references the given column via foreign key."""