Task: Do not yield corner case of fake removals as modified field

diff --git a/tasklib/task.py b/tasklib/task.py
index 1ab63479d96e140873730c2a39a5eea345627a78..f61fb056591c3afb22486ad62a30f78c586c8918 100644 (file)
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -245,7 +245,15 @@ class Task(TaskResource):
     def _modified_fields(self):
         writable_fields = set(self._data.keys()) - set(self.read_only_fields)
         for key in writable_fields:
-            if self._data.get(key) != self._original_data.get(key):
+            new_value = self._data.get(key)
+            old_value = self._original_data.get(key)
+
+            # Make sure not to mark data removal as modified field if the
+            # field originally had some empty value
+            if key in self._data and not new_value and not old_value:
+                continue
+
+            if new_value != old_value:
                 yield key
 
     @property