rjsf-team/react-jsonschema-form

oneOf nested objects/arrays with default values not using default values after changing between oneOf's

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#4476 opened on Jan 31, 2025

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 (2 comments) (0 reactions) (0 assignees)TypeScript (13,175 stars) (2,136 forks)batch import
bughelp wanted

Description

Prerequisites

What theme are you using?

core

Version

5.24.2

Current Behavior

Nested objects, arrays and arrays of objects in oneOf objects are not using default values set to them when changing to another oneOf object.

Expected Behavior

Default values should be applied to nested objects, arrays, arrays of objects when switching from one oneOf to another.

Steps To Reproduce

  1. Open this react-jsonschema-form playground link
  2. Change between different oneOf's (Test1, Test2, Test3)
  3. Fields arr, runner and runners should be updating when changing between the oneOf's

Environment

- OS: Windows 10, Ubuntu 20.04, 22.04, 24.04
- Node: 22.12.0, 20.12.2
- npm: 10.9.0

Anything else?

No response

Contributor guide

Tech stack
typescriptreact
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
React knowledgeJSON Schema basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the form state management logic in react jsonschema form, particularly how default values are applied when switching between oneOf options. Start by examining the `src/utils.js` or `src/components/Form.js` files. The playground link in the issue provides a reproducible example. Check if there are any existing tests related to oneOf defaults.