Closes #6071: Cable traces now traverse circuits

netbox/circuits/migrations/0029_circuit_tracing.py

@@ -0,0 +1,32 @@
+from django.db import migrations
+from django.db.models import Q
+
+
+def delete_obsolete_cablepaths(apps, schema_editor):
+    """
+    Delete all CablePath instances which originate or terminate at a CircuitTermination.
+    """
+    ContentType = apps.get_model('contenttypes', 'ContentType')
+    CircuitTermination = apps.get_model('circuits', 'CircuitTermination')
+    CablePath = apps.get_model('dcim', 'CablePath')
+
+    ct = ContentType.objects.get_for_model(CircuitTermination)
+    CablePath.objects.filter(Q(origin_type=ct) | Q(destination_type=ct)).delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('circuits', '0028_cache_circuit_terminations'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='circuittermination',
+            name='_path',
+        ),
+        migrations.RunPython(
+            code=delete_obsolete_cablepaths,
+            reverse_code=migrations.RunPython.noop
+        ),
+    ]