Add rack group initialiser

Fixes #192

Signed-off-by: Jeroen Simonetti <jeroen@simonetti.nl>

initializers/rack_groups.yml

@@ -0,0 +1,3 @@
+# - name: cage 101
+#   slug: cage-101
+#   site: SING 1

initializers/racks.yml

@@ -16,6 +16,7 @@
 #     text_field: Description
 # - site: SING 1
 #   name: rack-03
+#   group: cage 101
 #   role: Role 3
 #   type: 4-post cabinet
 #   width: 19 inches

startup_scripts/075_rack_groups.py

@@ -0,0 +1,31 @@
+from dcim.models import Site,RackGroup
+from ruamel.yaml import YAML
+
+from pathlib import Path
+import sys
+
+file = Path('/opt/netbox/initializers/rack_groups.yml')
+if not file.is_file():
+  sys.exit()
+
+with file.open('r') as stream:
+  yaml=YAML(typ='safe')
+  rack_groups= yaml.load(stream)
+
+  required_assocs = {
+    'site': (Site, 'name')
+  }
+
+  if rack_groups is not None:
+    for params in rack_groups:
+
+      for assoc, details in required_assocs.items():
+        model, field = details
+        query = { field: params.pop(assoc) }
+        params[assoc] = model.objects.get(**query)
+
+      rack_group, created = RackGroup.objects.get_or_create(**params)
+
+      if created:
+        print("🎨 Created rack group", rack_group.name)
+