From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 4 Feb 2007 03:50:54 +0000 (+0000)
Subject: polymorphic union uses the literal_column function for its "textual" column
X-Git-Tag: rel_0_3_5~58
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94c612e10687a6ff187aca70d96ef89637ab025f;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

polymorphic union uses the literal_column function for its "textual" column
---

diff --git a/lib/sqlalchemy/orm/util.py b/lib/sqlalchemy/orm/util.py
index 3ac1ac7f66..293ec03770 100644
--- a/lib/sqlalchemy/orm/util.py
+++ b/lib/sqlalchemy/orm/util.py
@@ -59,7 +59,7 @@ def polymorphic_union(table_map, typecolname, aliasname='p_union'):
     result = []
     for type, table in table_map.iteritems():
         if typecolname is not None:
-            result.append(sql.select([col(name, table) for name in colnames] + [sql.column("'%s'" % type).label(typecolname)], from_obj=[table]))
+            result.append(sql.select([col(name, table) for name in colnames] + [sql.literal_column("'%s'" % type).label(typecolname)], from_obj=[table]))
         else:
             result.append(sql.select([col(name, table) for name in colnames], from_obj=[table]))
     return sql.union_all(*result).alias(aliasname)