From 0ebe6d8233fa39812b7a35aa2a29f9998ca157f6 Mon Sep 17 00:00:00 2001
From: Pierre Ducroquet <pducroquet@entrouvert.com>
Date: Wed, 22 Jun 2022 13:52:22 +0200
Subject: [PATCH] PaymentBackend: skip poll faster if there is no transaction
 (#66487)

---
 combo/apps/lingo/models.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/combo/apps/lingo/models.py b/combo/apps/lingo/models.py
index 03318c81..c214f718 100644
--- a/combo/apps/lingo/models.py
+++ b/combo/apps/lingo/models.py
@@ -257,6 +257,9 @@ class PaymentBackend(models.Model):
             status__in=Transaction.RUNNING_STATUSES,
         ).order_by('pk')
         last_pk = -1
+        # skip fast in order to save some resources on database
+        if not transactions.exists():
+            return
         while True:
             # lock each transaction before trying to poll it
             with atomic():