From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 12 May 2006 17:11:46 +0000 (+0000)
Subject: added != support for None -> foo IS NOT NULL
X-Git-Tag: rel_0_2_0~32
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=91065e84c43b89320a5c604af4484c28df065187;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

added != support for None -> foo IS NOT NULL
---

diff --git a/lib/sqlalchemy/sql.py b/lib/sqlalchemy/sql.py
index 8c10a44d94..5edfe6f1fa 100644
--- a/lib/sqlalchemy/sql.py
+++ b/lib/sqlalchemy/sql.py
@@ -540,8 +540,12 @@ class CompareMixin(object):
     def _compare(self, operator, obj):
         if _is_literal(obj):
             if obj is None:
-                if operator != '=':
-                    raise ArgumentError("Only '=' operator can be used with NULL")
+                if operator == '=':
+                    return BooleanExpression(self._compare_self(), null(), 'IS')
+                elif operator == '!=':
+                    return BooleanExpression(self._compare_self(), null(), 'IS NOT')
+                else:
+                    raise exceptions.ArgumentError("Only '='/'!=' operators can be used with NULL")
                 return BooleanExpression(self._compare_self(), null(), 'IS')
             else:
                 obj = self._bind_param(obj)