Added more startup_scripts and initializers examples.

startup_scripts/190_prefixes.py

@@ -0,0 +1,53 @@
+from dcim.models import Site
+from ipam.models import Prefix, VLAN, Role, VRF
+from tenancy.models import Tenant
+from extras.models import CustomField, CustomFieldValue
+from ruamel.yaml import YAML
+
+from netaddr import IPNetwork
+from pathlib import Path
+import sys
+
+file = Path('/opt/netbox/initializers/prefixes.yml')
+if not file.is_file():
+  sys.exit()
+
+with file.open('r') as stream:
+  yaml = YAML(typ='safe')
+  prefixes = yaml.load(stream)
+
+  optional_assocs = {
+    'site': (Site, 'name'),
+    'tenant': (Tenant, 'name'),
+    'vlan': (VLAN, 'name'),
+    'role': (Role, 'name'),
+    'vrf': (VRF, 'name')
+  }
+
+  if prefixes is not None:
+    for params in prefixes:
+      custom_fields = params.pop('custom_fields', None)
+      params['prefix'] = IPNetwork(params['prefix'])
+
+      for assoc, details in optional_assocs.items():
+        if assoc in params:
+          model, field = details
+          query = { field: params.pop(assoc) }
+
+          params[assoc] = model.objects.get(**query)
+
+      prefix, created = Prefix.objects.get_or_create(**params)
+
+      if created:
+        if custom_fields is not None:
+          for cf_name, cf_value in custom_fields.items():
+            custom_field = CustomField.objects.get(name=cf_name)
+            custom_field_value = CustomFieldValue.objects.create(
+              field=custom_field,
+              obj=prefix,
+              value=cf_value
+            )
+
+            prefix.custom_field_values.add(custom_field_value)
+
+        print("Created Prefix", prefix.prefix)