From 6c633ebd6fbd427773057666c1312699bfce24f5 Mon Sep 17 00:00:00 2001
From: Jonas Lammler <jonas.lammler@hetzner-cloud.de>
Date: Wed, 16 Sep 2026 21:07:31 +0200
Subject: [PATCH 1/2] fix: only send load balancer service certificates when
 defined

The to_payload function was always adding the certificates to the payload, which is not an expected behavior if we want to support partial updates.
---
 hcloud/load_balancers/domain.py          | 8 ++++----
 tests/unit/load_balancers/test_client.py | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hcloud/load_balancers/domain.py b/hcloud/load_balancers/domain.py
index 7561af2a..35ef7d52 100644
--- a/hcloud/load_balancers/domain.py
+++ b/hcloud/load_balancers/domain.py
@@ -214,10 +214,10 @@ def to_payload(self) -> dict[str, Any]:
                 http["sticky_sessions"] = self.http.sticky_sessions
             if self.http.timeout_idle is not None:
                 http["timeout_idle"] = self.http.timeout_idle
-
-            http["certificates"] = [
-                certificate.id for certificate in self.http.certificates or []
-            ]
+            if self.http.certificates is not None:
+                http["certificates"] = [
+                    certificate.id for certificate in self.http.certificates
+                ]
 
             payload["http"] = http
 
diff --git a/tests/unit/load_balancers/test_client.py b/tests/unit/load_balancers/test_client.py
index d9558f6d..8ba8b4db 100644
--- a/tests/unit/load_balancers/test_client.py
+++ b/tests/unit/load_balancers/test_client.py
@@ -395,6 +395,7 @@ def test_add_service(
                 redirect_http=True,
                 sticky_sessions=True,
                 timeout_idle=60,
+                certificates=[],
             ),
         )
         action = resource_client.add_service(load_balancer, service)

From bad1dd3240c17e5f03558b3a012043a56786cd67 Mon Sep 17 00:00:00 2001
From: Jonas Lammler <jonas.lammler@hetzner-cloud.de>
Date: Wed, 16 Sep 2026 21:09:46 +0200
Subject: [PATCH 2/2] fix: linting error

---
 hcloud/load_balancers/domain.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hcloud/load_balancers/domain.py b/hcloud/load_balancers/domain.py
index 35ef7d52..6d3af62d 100644
--- a/hcloud/load_balancers/domain.py
+++ b/hcloud/load_balancers/domain.py
@@ -186,7 +186,7 @@ def __init__(
         self.health_check = health_check
         self.http = http
 
-    # pylint: disable=too-many-branches
+    # pylint: disable=too-many-branches,too-many-statements
     def to_payload(self) -> dict[str, Any]:
         """
         Generates the request payload from this domain object.