Script fails with KeyError when Optional Fields with defaults are missing from API payload #1004

New Issue

MrUnknownDE · 2026-04-05T19:39:26+02:00

MrUnknownDE commented

2026-04-05 19:39:26 +02:00

Originally created by @rizlas on 10/21/2025

NetBox Edition

NetBox Community

NetBox Version

v4.4.4

Python Version

3.10

Steps to Reproduce

Define a script in NetBox with fields like:

from extras.scripts import Script, BooleanVar, MultiObjectVar
from dcim.models import Device

class MyScript(Script):
    debug_mode = BooleanVar("Activate debug mode", default=False)

    def run(self, data, commit):
        debug = data["debug_mode"]  # Fails if not explicitly in payload
        return f"Debug mode: {debug}"

Run the script via:

curl -X POST \
-H "Authorization: Token TOKEN" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
https://netbox/api/extras/scripts/MyScript/ \
--data '{
  "data": {},
  "schedule_at": "2025-10-28 10:15:00",
  "interval": 360,
  "commit": true
}'

Expected Behavior

The script should run successfully, applying default values to omitted fields: debug_mode should default to False

Observed Behavior

The script crashes with:

KeyError: 'debug_mode'
Traceback (most recent call last):
  File "/opt/netbox/netbox/extras/jobs.py", line 46, in run_script
    script.output = script.run(data, commit)
                    ^^^^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 145, in run
KeyError: 'debug_mode'

*Originally created by @rizlas on 10/21/2025* ### NetBox Edition NetBox Community ### NetBox Version v4.4.4 ### Python Version 3.10 ### Steps to Reproduce Define a script in NetBox with fields like: from extras.scripts import Script, BooleanVar, MultiObjectVar from dcim.models import Device ```python class MyScript(Script): debug_mode = BooleanVar("Activate debug mode", default=False) def run(self, data, commit): debug = data["debug_mode"] # Fails if not explicitly in payload return f"Debug mode: {debug}" ``` Run the script via: ```bash curl -X POST \ -H "Authorization: Token TOKEN" \ -H "Content-Type: application/json" \ -H "Accept: application/json; indent=4" \ https://netbox/api/extras/scripts/MyScript/ \ --data '{ "data": {}, "schedule_at": "2025-10-28 10:15:00", "interval": 360, "commit": true }' ``` ### Expected Behavior The script should run successfully, applying default values to omitted fields: debug_mode should default to False ### Observed Behavior The script crashes with: ```python KeyError: 'debug_mode' Traceback (most recent call last): File "/opt/netbox/netbox/extras/jobs.py", line 46, in run_script script.output = script.run(data, commit) ^^^^^^^^^^^^^^^^^^^^^^^^ File "<string>", line 145, in run KeyError: 'debug_mode' ```

MrUnknownDE closed this issue

2026-04-05 19:39:26 +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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Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/netbox#1004