✨ Include Initializers

Initializers are startup scripts for common tasks like creating custom
fields. These are problems many users of Netbox Docker potentially face
and are therefore worth sharing.

startup_scripts/20_custom_fields.py

@@ -0,0 +1,68 @@
+from extras.constants import CF_TYPE_TEXT, CF_TYPE_INTEGER, CF_TYPE_BOOLEAN, CF_TYPE_DATE, CF_TYPE_URL, CF_TYPE_SELECT
+from extras.models import CustomField, CustomFieldChoice
+
+from ruamel.yaml import YAML
+
+text_to_fields = {
+  'boolean': CF_TYPE_BOOLEAN,
+  'date': CF_TYPE_DATE,
+  'integer': CF_TYPE_INTEGER,
+  'selection': CF_TYPE_SELECT,
+  'text': CF_TYPE_TEXT,
+  'url': CF_TYPE_URL,
+}
+
+def get_class_for_class_path(class_path):
+  import importlib
+  from django.contrib.contenttypes.models import ContentType
+
+  module_name, class_name = class_path.rsplit(".", 1)
+  module = importlib.import_module(module_name)
+  clazz = getattr(module, class_name)
+  return ContentType.objects.get_for_model(clazz)
+
+with open('/opt/netbox/initializers/custom_fields.yml', 'r') as stream:
+  yaml = YAML(typ='safe')
+  customfields = yaml.load(stream)
+
+  if customfields is not None:
+    for cf_name, cf_details in customfields.items():
+      custom_field, created = CustomField.objects.get_or_create(name = cf_name)
+
+      if created:
+        if cf_details.get('default', 0):
+          custom_field.default = cf_details['default']
+
+        if cf_details.get('description', 0):
+          custom_field.description = cf_details['description']
+
+        if cf_details.get('filterable', 0):
+          custom_field.is_filterables = cf_details['filterable']
+
+        if cf_details.get('label', 0):
+          custom_field.label = cf_details['label']
+
+        for object_type in cf_details.get('on_objects', []):
+          custom_field.obj_type.add(get_class_for_class_path(object_type))
+
+        if cf_details.get('required', 0):
+          custom_field.required = cf_details['required']
+
+        if cf_details.get('type', 0):
+          custom_field.type = text_to_fields[cf_details['type']]
+
+        if cf_details.get('weight', 0):
+          custom_field.weight = cf_details['weight']
+
+        custom_field.save()
+
+        for choice_details in cf_details.get('choices', []):
+          choice = CustomFieldChoice.objects.create(
+            field=custom_field,
+            value=choice_details['value'])
+
+          if choice_details.get('weight', 0):
+            choice.weight = choice_details['weight']
+            choice.save()
+
+        print("🔧 Created custom field", cf_name)