From 3973f212c865541e78afa16485cc23a8f6bd8b5e Mon Sep 17 00:00:00 2001
From: Brett Hoerner <brett@posthog.com>
Date: Mon, 18 Mar 2024 14:46:12 -0600
Subject: [PATCH] fix(batch-exports): handle null end_at in workflow_id
 (#20988)

---
 posthog/batch_exports/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/posthog/batch_exports/models.py b/posthog/batch_exports/models.py
index 35fa6e8ba4754..70b85c4d35bde 100644
--- a/posthog/batch_exports/models.py
+++ b/posthog/batch_exports/models.py
@@ -306,5 +306,5 @@ class Status(models.TextChoices):
     def workflow_id(self) -> str:
         """Return the Workflow id that corresponds to this BatchExportBackfill model."""
         start_at = self.start_at.strftime("%Y-%m-%dT%H:%M:%S")
-        end_at = self.end_at.strftime("%Y-%m-%dT%H:%M:%S")
+        end_at = self.end_at and self.end_at.strftime("%Y-%m-%dT%H:%M:%S")
         return f"{self.batch_export.id}-Backfill-{start_at}-{end_at}"