Closes #10762: Permit selection custom fields to have only one choice

docs/release-notes/version-3.4.md

@@ -2,6 +2,10 @@
 
 ## v3.4.4 (FUTURE)
 
+### Enhancements
+
+* [#10762](https://github.com/netbox-community/netbox/issues/10762) - Permit selection custom fields to have only one choice
+
 ### Bug Fixes
 
 * [#11487](https://github.com/netbox-community/netbox/issues/11487) - Remove "set null" option from non-writable custom fields during bulk edit

netbox/extras/models/customfields.py

@@ -273,10 +273,13 @@ class CustomField(CloningMixin, ExportTemplatesMixin, WebhooksMixin, ChangeLogge
                 'choices': "Choices may be set only for custom selection fields."
             })
 
-        # A selection field must have at least two choices defined
-        if self.type == CustomFieldTypeChoices.TYPE_SELECT and self.choices and len(self.choices) < 2:
+        # Selection fields must have at least one choice defined
+        if self.type in (
+                CustomFieldTypeChoices.TYPE_SELECT,
+                CustomFieldTypeChoices.TYPE_MULTISELECT
+        ) and not self.choices:
             raise ValidationError({
-                'choices': "Selection fields must specify at least two choices."
+                'choices': "Selection fields must specify at least one choice."
             })
 
         # A selection field's default (if any) must be present in its available choices

netbox/extras/tests/test_api.py

@@ -101,6 +101,7 @@ class CustomFieldTest(APIViewTestCases.APIViewTestCase):
             'content_types': ['dcim.site'],
             'name': 'cf6',
             'type': 'select',
+            'choices': ['A', 'B', 'C']
         },
     ]
     bulk_update_data = {