From 5c3d91e65e5bf38932ad54659ab60820b8cd37db Mon Sep 17 00:00:00 2001
From: David Bordeynik <david.bordeynik@gmail.com>
Date: Mon, 16 Feb 2015 12:25:37 +0200
Subject: [PATCH] Fix #866:  does not follow

---
 docs/changelog.rst                 | 1 +
 mongoengine/base/datastructures.py | 4 ++++
 tests/fields/fields.py             | 5 +++++
 3 files changed, 10 insertions(+)

diff --git a/docs/changelog.rst b/docs/changelog.rst
index e70fc8e3..a90b2373 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -5,6 +5,7 @@ Changelog
 
 Changes in 0.9.X - DEV
 ======================
+- `BaseDict` does not follow `setdefault` #866
 - Add support for $type operator # 766
 - Fix tests for pymongo 2.8+ #877
 - No module named 'django.utils.importlib' (Django dev) #872
diff --git a/mongoengine/base/datastructures.py b/mongoengine/base/datastructures.py
index abe41a14..022338d7 100644
--- a/mongoengine/base/datastructures.py
+++ b/mongoengine/base/datastructures.py
@@ -75,6 +75,10 @@ class BaseDict(dict):
         self._mark_as_changed()
         return super(BaseDict, self).popitem(*args, **kwargs)
 
+    def setdefault(self, *args, **kwargs):
+        self._mark_as_changed()
+        return super(BaseDict, self).setdefault(*args, **kwargs)
+
     def update(self, *args, **kwargs):
         self._mark_as_changed()
         return super(BaseDict, self).update(*args, **kwargs)
diff --git a/tests/fields/fields.py b/tests/fields/fields.py
index ab220b25..8e957c68 100644
--- a/tests/fields/fields.py
+++ b/tests/fields/fields.py
@@ -1176,6 +1176,11 @@ class FieldTest(unittest.TestCase):
         post.reload()
         self.assertEqual('updated', post.info['title'])
 
+        post.info.setdefault('authors', [])
+        post.save()
+        post.reload()
+        self.assertEqual([], post.info['authors'])
+
         BlogPost.drop_collection()
 
     def test_dictfield_strict(self):