Custom Field Choice Set: Duplicate values result in missing options in Selection field UI #664

New Issue

MrUnknownDE · 2026-04-05T17:04:07+02:00

MrUnknownDE commented

2026-04-05 17:04:07 +02:00

Originally created by @Mister-MAP on 1/5/2026

NetBox Edition

NetBox Community

NetBox Version

v4.4.8

Python Version

3.12

Steps to Reproduce

Go to Customization > Custom Field Choices.
Create a new Choice Set (e.g., "Region").
In the Extra Choices add the following entries with duplicate values:
dc1:Asia
dc1:Europe
dc2:America
Save the Custom Field Choice Set (System accepts this without error).
Go to Customization > Custom Fields.
Create a new field:

Name: "Region"
Type: Selection
Choice Set: "Region"

Object Types: IPAM > VLAN (or any other object)

Navigate to IPAM > VLANs and click Add.
Try to select a value in the newly created custom field (there will be only one entry with dc1 value).

Expected Behavior

Scenario A (Likely intended): NetBox should prevent saving the Choice Set if duplicate values exist, raising a validation error (e.g., "Values must be unique").
Scenario B (Preferable for my case): If duplicate values are permitted, the dropdown UI should display both "Asia" and "Europe" as distinct selectable options.

Observed Behavior

The Choice Set is saved successfully with duplicate values.
In the VLAN creation form, the dropdown list shows:

Asia (value: dc1)
America (value: dc2)

The option Europe (value: dc1) is missing from the list.

It seems the UI de-duplicates options based on the value key.

*Originally created by @Mister-MAP on 1/5/2026* ### NetBox Edition NetBox Community ### NetBox Version v4.4.8 ### Python Version 3.12 ### Steps to Reproduce 1. Go to Customization > Custom Field Choices. 2. Create a new Choice Set (e.g., "Region"). 3. In the Extra Choices add the following entries with duplicate values: dc1:Asia dc1:Europe dc2:America 4. Save the Custom Field Choice Set (System accepts this without error). 5. Go to Customization > Custom Fields. 6. Create a new field: - Name: "Region" - Type: Selection - Choice Set: "Region" <img width="1262" height="321" alt="Image" src="https://github.com/user-attachments/assets/725b353e-7e5b-449e-a74d-cdf392671ebf" /> <img width="714" height="149" alt="Image" src="https://github.com/user-attachments/assets/bd56f401-f037-4dd5-aa90-41abe322e8c9" /> - Object Types: IPAM > VLAN (or any other object) 7. Navigate to IPAM > VLANs and click Add. 8. Try to select a value in the newly created custom field (there will be only one entry with dc1 value). ### Expected Behavior Scenario A (Likely intended): NetBox should prevent saving the Choice Set if duplicate values exist, raising a validation error (e.g., "Values must be unique"). Scenario B (Preferable for my case): If duplicate values are permitted, the dropdown UI should display both "Asia" and "Europe" as distinct selectable options. ### Observed Behavior 1. The Choice Set is saved successfully with duplicate values. 2. In the VLAN creation form, the dropdown list shows: - Asia (value: dc1) - America (value: dc2) 3. The option Europe (value: dc1) is missing from the list. It seems the UI de-duplicates options based on the value key.

MrUnknownDE closed this issue

2026-04-05 17:04:07 +02:00

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Branches Tags

main

21455-sql-indexes-audit

21357-register-model-actions

feature

20924-plugin-ui-components

21766-improve-test-coverage-for-sortable-table-columns

21157-export-template-public-models

21025-pre-render-config-contexts

21364-swagger

feature-ip-prefix-link

20911-dropdown-3

fix_module_substitution

21160-filterset

20911-dropdown-2

20044-elevation-stuck-lightmode

7604-filter-modifiers-v3

20660-script-load

19724-graphql

14884-script

19720-macaddress-interface-generic-relation

fix-19669-api-image-download

7604-filter-modifiers

19275-fixes-interface-bulk-edit

fix-17794-get_field_value_return_list

11507-show-aggregate-and-rir-on-api

9583-add_column_specific_search_field_to_tables

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Reference: github/netbox#664