From 4e9949f69d6ae8c4d4d53e164f27e74c9a87225b Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Wed, 23 Jan 2019 15:28:05 -0500
Subject: [PATCH] Fix a bug in the tag backfill that prevented copying
 lifetime_start_ts when it is zero

---
 workers/tagbackfillworker.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/workers/tagbackfillworker.py b/workers/tagbackfillworker.py
index 226a7f9dc..fa5f5b8d0 100644
--- a/workers/tagbackfillworker.py
+++ b/workers/tagbackfillworker.py
@@ -181,9 +181,9 @@ def backfill_tag(repositorytag):
     return False
 
   lifetime_start_ms = (repositorytag.lifetime_start_ts * 1000
-                       if repositorytag.lifetime_start_ts else None)
+                       if repositorytag.lifetime_start_ts is not None else None)
   lifetime_end_ms = (repositorytag.lifetime_end_ts * 1000
-                     if repositorytag.lifetime_end_ts else None)
+                     if repositorytag.lifetime_end_ts is not None else None)
 
   # Create the new Tag.
   with db_transaction():