Fixes #5626: Fix REST API representation for circuit terminations connected to non-interface endpoints

docs/release-notes/version-2.10.md

@@ -4,6 +4,7 @@
 
 ### Bug Fixes
 
+* [#5626](https://github.com/netbox-community/netbox/issues/5626) - Fix REST API representation for circuit terminations connected to non-interface endpoints
 * [#5716](https://github.com/netbox-community/netbox/issues/5716) - Fix filtering rack reservations by custom field
 * [#5718](https://github.com/netbox-community/netbox/issues/5718) - Fix bulk editing of services when no port(s) are defined
 * [#5735](https://github.com/netbox-community/netbox/issues/5735) - Ensure consistent treatment of duplicate IP addresses

netbox/circuits/api/serializers.py

@@ -40,14 +40,16 @@ class CircuitTypeSerializer(ValidatedModelSerializer):
         fields = ['id', 'url', 'name', 'slug', 'description', 'circuit_count']
 
 
-class CircuitCircuitTerminationSerializer(WritableNestedSerializer):
+class CircuitCircuitTerminationSerializer(WritableNestedSerializer, ConnectedEndpointSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='circuits-api:circuittermination-detail')
     site = NestedSiteSerializer()
-    connected_endpoint = NestedInterfaceSerializer()
 
     class Meta:
         model = CircuitTermination
-        fields = ['id', 'url', 'site', 'connected_endpoint', 'port_speed', 'upstream_speed', 'xconnect_id']
+        fields = [
+            'id', 'url', 'site', 'port_speed', 'upstream_speed', 'xconnect_id', 'connected_endpoint',
+            'connected_endpoint_type', 'connected_endpoint_reachable',
+        ]
 
 
 class CircuitSerializer(TaggedObjectSerializer, CustomFieldModelSerializer):