API filter for string custom fields doesn't work properly #1610

New Issue

MrUnknownDE · 2026-04-06T04:56:31+02:00

MrUnknownDE commented

2026-04-06 04:56:31 +02:00

Originally created by @llamafilm on 7/18/2025

Deployment Type

Self-hosted

NetBox Version

v4.3.2

Python Version

3.12

Steps to Reproduce

Create a string type custom field called FWversion.
Set this value to 1 on one device, and 10 for another device.
Filter using dcim/devices/?cf_FWversion=1

Expected Behavior

It should return only the device with exactly matching value, according to the documentation:

To filter results by a custom field value, prepend cf_ to the custom field name. For example, the following query will return only sites where a custom field named foo is equal to 123:
GET /api/dcim/sites/?cf_foo=123

Observed Behavior

It returns both devices. I believe it returns all devices where that field contains the value instead of an exact match.

*Originally created by @llamafilm on 7/18/2025* ### Deployment Type Self-hosted ### NetBox Version v4.3.2 ### Python Version 3.12 ### Steps to Reproduce 1. Create a string type custom field called `FWversion`. 2. Set this value to `1` on one device, and `10` for another device. 3. Filter using `dcim/devices/?cf_FWversion=1` ### Expected Behavior It should return only the device with exactly matching value, according to the documentation: > To filter results by a custom field value, prepend cf_ to the custom field name. For example, the following query will return only sites where a custom field named foo is equal to 123: > `GET /api/dcim/sites/?cf_foo=123` ### Observed Behavior It returns both devices. I believe it returns all devices where that field _contains_ the value instead of an exact match.

MrUnknownDE closed this issue

2026-04-06 04:56:31 +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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Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/netbox#1610