Fixes #7761: Extend cable tracing across bridged interfaces

docs/release-notes/version-3.1.md

@@ -3,6 +3,7 @@
 ### Enhancements
 
 * [#7619](https://github.com/netbox-community/netbox/issues/7619) - Permit custom validation rules to be defined as plain data or dotted path to class
+* [#7761](https://github.com/netbox-community/netbox/issues/7761) - Extend cable tracing across bridged interfaces
 * [#7769](https://github.com/netbox-community/netbox/issues/7769) - Enable assignment of IP addresses to an existing FHRP group
 * [#7775](https://github.com/netbox-community/netbox/issues/7775) - Enable dynamic config for `CHANGELOG_RETENTION`, `CUSTOM_VALIDATORS`, and `GRAPHQL_ENABLED`
 

netbox/dcim/models/device_components.py

@@ -189,15 +189,23 @@ class PathEndpoint(models.Model):
         abstract = True
 
     def trace(self):
-        if self._path is None:
-            return []
+        origin = self
+        path = []
 
         # Construct the complete path
-        path = [self, *self._path.get_path()]
-        while (len(path) + 1) % 3:
-            # Pad to ensure we have complete three-tuples (e.g. for paths that end at a non-connected FrontPort)
-            path.append(None)
-        path.append(self._path.destination)
+        while origin is not None:
+
+            if origin._path is None:
+                return path
+
+            path.extend([origin, *origin._path.get_path()])
+            while (len(path) + 1) % 3:
+                # Pad to ensure we have complete three-tuples (e.g. for paths that end at a non-connected FrontPort)
+                path.append(None)
+            path.append(origin._path.destination)
+
+            # Check for bridge interface to continue the trace
+            origin = getattr(origin._path.destination, 'bridge', None)
 
         # Return the path as a list of three-tuples (A termination, cable, B termination)
         return list(zip(*[iter(path)] * 3))