Add dict.update() support to BaseDict.

mongoengine/base.py

@@ -1293,6 +1293,10 @@ class BaseDict(dict):
         self._mark_as_changed()
         super(BaseDict, self).popitem(*args, **kwargs)
 
+    def update(self, *args, **kwargs):
+        self._mark_as_changed()
+        super(BaseDict, self).update(*args, **kwargs)
+
     def _mark_as_changed(self):
         if hasattr(self._instance, '_mark_as_changed'):
             self._instance._mark_as_changed(self._name)

tests/fields.py

@@ -772,6 +772,13 @@ class FieldTest(unittest.TestCase):
         # Confirm handles non strings or non existing keys
         self.assertEquals(BlogPost.objects.filter(info__details__test__exact=5).count(), 0)
         self.assertEquals(BlogPost.objects.filter(info__made_up__test__exact='test').count(), 0)
+
+        post = BlogPost.objects.create(info={'title': 'original'})
+        post.info.update({'title': 'updated'})
+        post.save()
+        post.reload()
+        self.assertEquals('updated', post.info['title'])
+
         BlogPost.drop_collection()
 
     def test_dictfield_strict(self):