X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/ef4e6774912c7170239ed559bc215acdfe9d28db..534403b480471617e4cf509bc085a55eadce1e49:/tasklib/task.py

diff --git a/tasklib/task.py b/tasklib/task.py
index b56936e..a739d25 100644
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -95,7 +95,7 @@ class SerializingObject(object):
     def deserialize_tags(self, tags):
         if isinstance(tags, basestring):
             return tags.split(',') if tags else []
-        return tags
+        return tags or []
 
     def serialize_depends(self, cur_dependencies):
         # Return the list of uuids
@@ -126,7 +126,10 @@ class TaskResource(SerializingObject):
         except ValueError:
             pass
 
-        return self._data.get(key) or self._deserialize(key, None)
+        if key not in self._data:
+            self._data[key] = self._deserialize(key, None)
+
+        return self._data.get(key)
 
     def __setitem__(self, key, value):
         if key in self.read_only_fields: