From 96542418c0985db17228dd92d016cb3233d40de9 Mon Sep 17 00:00:00 2001
From: Griatch <griatch@gmail.com>
Date: Sun, 26 Jun 2016 11:56:58 +0200
Subject: [PATCH] Made sure that the various _SaverMutable objects evaluate to
 False when they are empty.

---
 evennia/utils/dbserialize.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/evennia/utils/dbserialize.py b/evennia/utils/dbserialize.py
index e75126a53..3e69f1983 100644
--- a/evennia/utils/dbserialize.py
+++ b/evennia/utils/dbserialize.py
@@ -131,6 +131,10 @@ class _SaverMutable(object):
         self._db_obj = kwargs.pop("db_obj", None)
         self._data = None
 
+    def __nonzero__(self):
+        "Make sure to evaluate as False if empty"
+        return bool(self._data)
+
     def _save_tree(self):
         "recursively traverse back up the tree, save when we reach the root"
         if self._parent: