Fix consistent check for missing _unindex entry

zopefoundation · May 24, 2019 · 0c5493a · 0c5493a
1 parent 5f6c287
commit 0c5493a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/Products/PluginIndexes/KeywordIndex/KeywordIndex.py b/src/Products/PluginIndexes/KeywordIndex/KeywordIndex.py
@@ -67,9 +67,9 @@ def _index_object(self, documentId, obj, threshold=None, attr=''):
         # we'll do so.
 
         newKeywords = self._get_object_keywords(obj, attr)
-        oldKeywords = self._unindex.get(documentId, None)
+        oldKeywords = self._unindex.get(documentId, _marker)
 
-        if oldKeywords is None or oldKeywords in (missing, empty):
+        if oldKeywords is _marker or oldKeywords in (missing, empty):
             # we've got a new document, let's not futz around.
             if newKeywords in (missing, empty):
                 self.insertSpecialIndexEntry(newKeywords, documentId)