- Fixed the evaluator not being able to evaluate IS NULL clauses.

- Added evaluator tests to orm/alltests.py

3 files changed, 5 insertions, 1 deletions

diff --git a/CHANGES b/CHANGES
index bb921bb52..bd853aac4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -8,6 +8,8 @@ CHANGES
 =====
 
 - orm
+    - Fixed the evaluator not being able to evaluate IS NULL clauses.
+
     - Fixed the "set collection" function on "dynamic" relations to
       initiate events correctly.  Previously a collection could only
       be assigned to a pending parent instance, otherwise modified
diff --git a/lib/sqlalchemy/orm/evaluator.py b/lib/sqlalchemy/orm/evaluator.py
index 4611dd91b..9076f610d 100644
--- a/lib/sqlalchemy/orm/evaluator.py
+++ b/lib/sqlalchemy/orm/evaluator.py
@@ -68,7 +68,7 @@ class EvaluatorCompiler(object):
         if operator is operators.is_:
             def evaluate(obj):
                 return eval_left(obj) == eval_right(obj)
-        if operator is operators.isnot:
+        elif operator is operators.isnot:
             def evaluate(obj):
                 return eval_left(obj) != eval_right(obj)
         elif operator in _straight_ops:
diff --git a/test/orm/alltests.py b/test/orm/alltests.py
index a95eca762..9458ca523 100644
--- a/test/orm/alltests.py
+++ b/test/orm/alltests.py
@@ -41,6 +41,8 @@ def suite():
         'orm.onetoone',
         'orm.dynamic',
 
+        'orm.evaluator',
+
         'orm.deprecations',
         )
     alltests = unittest.TestSuite()