travis: Test with Python 3.6

[etc/taskwarrior.git] / tasklib / serializing.py

diff --git a/tasklib/serializing.py b/tasklib/serializing.py
index ff9b9778df90deb6a8e11a95a9ee95a98ecb3c25..8cdeaf286bc8a44cf9c4fafdb7cd689162273ac2 100644 (file)
--- a/tasklib/serializing.py
+++ b/tasklib/serializing.py
@@ -6,7 +6,7 @@ import six
 import tzlocal
 
 
-from .lazy import LazyUUIDTaskSet
+from .lazy import LazyUUIDTaskSet, LazyUUIDTask
 
 DATE_FORMAT = '%Y%m%dT%H%M%SZ'
 local_zone = tzlocal.get_localzone()
@@ -181,6 +181,12 @@ class SerializingObject(object):
             return set(tags.split(',')) if tags else set()
         return set(tags or [])
 
+    def serialize_parent(self, parent):
+        return parent['uuid'] if parent else ''
+
+    def deserialize_parent(self, uuid):
+        return LazyUUIDTask(self.backend, uuid) if uuid else None
+
     def serialize_depends(self, value):
         # Return the list of uuids
         value = value if value is not None else set()