Fixed DecimalField bug

tests/queryset.py

@@ -623,6 +623,27 @@ class QuerySetTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+    def test_update_pull(self):
+        """Ensure that the 'pull' update operation works correctly.
+        """
+        class Comment(EmbeddedDocument):
+            content = StringField()
+
+        class BlogPost(Document):
+            slug = StringField()
+            comments = ListField(EmbeddedDocumentField(Comment))
+
+        comment1 = Comment(content="test1")
+        comment2 = Comment(content="test2")
+
+        post = BlogPost(slug="test", comments=[comment1, comment2])
+        post.save()
+        self.assertTrue(comment2 in post.comments)
+
+        BlogPost.objects(slug="test").update(pull__comments__content="test2")
+        post.reload()
+        self.assertTrue(comment2 not in post.comments)
+
     def test_order_by(self):
         """Ensure that QuerySets may be ordered.
         """