Implement nested RackGroups

netbox/dcim/migrations/0102_nested_rackgroups_rebuild.py

@@ -0,0 +1,21 @@
+from django.db import migrations
+
+
+def rebuild_mptt(apps, schema_editor):
+    RackGroup = apps.get_model('dcim', 'RackGroup')
+    for i, rackgroup in enumerate(RackGroup.objects.all(), start=1):
+        RackGroup.objects.filter(pk=rackgroup.pk).update(tree_id=i)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dcim', '0101_nested_rackgroups'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            code=rebuild_mptt,
+            reverse_code=migrations.RunPython.noop
+        ),
+    ]