Fixes #817: Update last_updated time of a circuit when editing a child termination

netbox/circuits/signals.py

@@ -0,0 +1,13 @@
+from django.db.models.signals import post_delete, post_save
+from django.dispatch import receiver
+from django.utils import timezone
+
+from .models import Circuit, CircuitTermination
+
+
+@receiver((post_save, post_delete), sender=CircuitTermination)
+def update_circuit(instance, **kwargs):
+    """
+    When a CircuitTermination has been modified, update the last_updated time of its parent Circuit.
+    """
+    Circuit.objects.filter(pk=instance.circuit_id).update(last_updated=timezone.now())