fix(wireless): Correct attribute check in WirelessLink signal handler

Fix typo in post_save signal checking `interface_b.cable` instead of
`interface_b.wireless_link`, preventing unnecessary re-saves.
Add regression test verifying interfaces aren't logged on link re-save.

Fixes #22183

netbox/wireless/signals.py

@@ -29,7 +29,7 @@ def update_connected_interfaces(instance, created, raw=False, **kwargs):
         logger.debug(f"Updating interface A for wireless link {instance}")
         instance.interface_a.wireless_link = instance
         instance.interface_a.save()
-    if instance.interface_b.cable != instance:
+    if instance.interface_b.wireless_link != instance:
         logger.debug(f"Updating interface B for wireless link {instance}")
         instance.interface_b.wireless_link = instance
         instance.interface_b.save()

netbox/wireless/tests/test_models.py

@@ -0,0 +1,61 @@
+from uuid import uuid4
+
+from django.contrib.contenttypes.models import ContentType
+from django.test import RequestFactory, TestCase
+
+from core.models import ObjectChange
+from dcim.choices import InterfaceTypeChoices
+from dcim.models import Interface
+from netbox.context_managers import event_tracking
+from users.models import User
+from utilities.testing import create_test_device
+from wireless.models import WirelessLink
+
+
+class WirelessLinkTestCase(TestCase):
+
+    @classmethod
+    def setUpTestData(cls):
+        cls.device = create_test_device('Device 1')
+        cls.user = User.objects.create_user(username='testuser')
+
+    def test_resaving_wireless_link_does_not_log_connected_interfaces(self):
+        interface_a = Interface.objects.create(
+            device=self.device,
+            name='radio0',
+            type=InterfaceTypeChoices.TYPE_80211AC,
+        )
+        interface_b = Interface.objects.create(
+            device=self.device,
+            name='radio1',
+            type=InterfaceTypeChoices.TYPE_80211AC,
+        )
+        wireless_link = WirelessLink.objects.create(
+            interface_a=interface_a,
+            interface_b=interface_b,
+            ssid='LINK1',
+        )
+
+        interface_a.refresh_from_db()
+        interface_b.refresh_from_db()
+        self.assertEqual(interface_a.wireless_link, wireless_link)
+        self.assertEqual(interface_b.wireless_link, wireless_link)
+
+        # Reload the WirelessLink to avoid relying on FK objects cached during creation.
+        wireless_link = WirelessLink.objects.get(pk=wireless_link.pk)
+
+        request = RequestFactory().post('/')
+        request.id = uuid4()
+        request.user = self.user
+
+        with event_tracking(request):
+            wireless_link.snapshot()
+            wireless_link.save()
+
+        interface_type = ContentType.objects.get_for_model(Interface)
+        self.assertFalse(
+            ObjectChange.objects.filter(
+                changed_object_type=interface_type,
+                changed_object_id__in=(interface_a.pk, interface_b.pk),
+            ).exists()
+        )