add update() support to MutableDict

2 files changed, 16 insertions, 0 deletions

diff --git a/lib/sqlalchemy/ext/mutable.py b/lib/sqlalchemy/ext/mutable.py
index 7469bcbda..3ef2f979d 100644
--- a/lib/sqlalchemy/ext/mutable.py
+++ b/lib/sqlalchemy/ext/mutable.py
@@ -621,6 +621,10 @@ class MutableDict(Mutable, dict):
         dict.__delitem__(self, key)
         self.changed()
 
+    def update(self, *a, **kw):
+        dict.update(self, *a, **kw)
+        self.changed()
+
     def clear(self):
         dict.clear(self)
         self.changed()
diff --git a/test/ext/test_mutable.py b/test/ext/test_mutable.py
index 32b3e11dd..9065f3d03 100644
--- a/test/ext/test_mutable.py
+++ b/test/ext/test_mutable.py
@@ -86,6 +86,18 @@ class _MutableDictTestBase(object):
 
         eq_(f1.data, {})
 
+    def test_update(self):
+        sess = Session()
+
+        f1 = Foo(data={'a': 'b'})
+        sess.add(f1)
+        sess.commit()
+
+        f1.data.update({'a': 'z'})
+        sess.commit()
+
+        eq_(f1.data, {'a': 'z'})
+
     def test_setdefault(self):
         sess = Session()