Unable to update custom fields in a custom script #615

New Issue

MrUnknownDE · 2026-04-05T16:53:54+02:00

MrUnknownDE commented

2026-04-05 16:53:54 +02:00

Originally created by @ahusking on 1/12/2026

NetBox Edition

NetBox Community

NetBox Version

v4.5.0-Docker-3.4.2

Python Version

3.12

Steps to Reproduce

Create a custom field on an object
write a custom script that updates that custom object
run custom script, script won't error, but there also won't be any data in the custom field.

I've tried the following combinations of code

contact=Contact.objects.get(email=user["email"])
contact.custom_field_data["duo_id"] = user['user_id']
contact.save

no errors, no updates to data

contact=Contact.objects.get(email=user["email"])
contact.custom_fields["duo_id"] = user['user_id']
contact.save

I get TypeError: 'RestrictedQuerySet' object does not support item assignment

When I try the example here https://groups.google.com/g/netbox-discuss/c/Tvc_aJOLZNk I get error's about importing from extras.models

I feel I'm missing something, but I haven't been able to find what

Expected Behavior

custom field should be updated

Observed Behavior

custom field is not updated

*Originally created by @ahusking on 1/12/2026* ### NetBox Edition NetBox Community ### NetBox Version v4.5.0-Docker-3.4.2 ### Python Version 3.12 ### Steps to Reproduce 1) Create a custom field on an object 2) write a custom script that updates that custom object 3) run custom script, script won't error, but there also won't be any data in the custom field. I've tried the following combinations of code ``` contact=Contact.objects.get(email=user["email"]) contact.custom_field_data["duo_id"] = user['user_id'] contact.save ``` no errors, no updates to data ``` contact=Contact.objects.get(email=user["email"]) contact.custom_fields["duo_id"] = user['user_id'] contact.save ``` I get TypeError: 'RestrictedQuerySet' object does not support item assignment When I try the example here https://groups.google.com/g/netbox-discuss/c/Tvc_aJOLZNk I get error's about importing from extras.models I feel I'm missing something, but I haven't been able to find what ### Expected Behavior custom field should be updated ### Observed Behavior custom field is not updated

MrUnknownDE closed this issue

2026-04-05 16:53:54 +02:00

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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#615