Validation-only logic applied via `oneOf`/`anyOf` should not try to render fields · rjsf-team/react-jsonschema-form#4574

2025-04-21T18:16:50.000Z

### Prerequisites - [x] I have searched the existing issues - [x] I understand that providing a [SSCCE](http://sscce.org/) example is tremendously useful to the maintainers. - [x] I have read the [documentation](https://rjsf-team.github.io/react-jsonschema-form/docs) - [x] Ideally, I'm providing a [sample JSFiddle](https://jsfiddle.net), [Codesandbox.io](https://codesandbox.io) or preferably a [shared playground link](https://rjsf-team.github.io/react-jsonschema-form/) demonstrating the issue. ### What theme are you using? core ### Version 5.x ### Current Behavior The [spec](https://json-schema.org/understanding-json-schema/reference/combining#oneOf) has the following schema as an example: ```json { "oneOf": [ { "type": "number", "multipleOf": 5 }, { "type": "number", "multipleOf": 3 } ] } ``` The following is rendered: ![Image](https://github.com/user-attachments/assets/fb00eb9f-68b7-444d-89fb-b5aedbe17fef) [Playground Link](https://rjsf-team.github.io/react-jsonschema-form/#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) ### Expected Behavior Only one field is rendered ### Steps To Reproduce _No response_ ### Environment ```markdown ``` ### Anything else? _No response_

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any-one-all-ofbughelp wanted

Beschreibung

Prerequisites

I have searched the existing issues
I understand that providing a SSCCE example is tremendously useful to the maintainers.
I have read the documentation
Ideally, I'm providing a sample JSFiddle, Codesandbox.io or preferably a shared playground link demonstrating the issue.

What theme are you using?

core

Version

5.x

Current Behavior

The spec has the following schema as an example:

{
  "oneOf": [
    {
      "type": "number",
      "multipleOf": 5
    },
    {
      "type": "number",
      "multipleOf": 3
    }
  ]
}

The following is rendered:

Playground Link

Expected Behavior

Only one field is rendered

Steps To Reproduce

No response

Environment

Anything else?

No response

Contributor Guide

Tech Stack: reacttypescript
Domain: frontend
Issue Type: bug
Schwierigkeit: 3
Geschätzte Zeit: half day
Aktivitätsstatus: fresh
Klarheit: clear
Voraussetzungen: reacttypescriptJSON Schema basics
Einsteigerfreundlichkeit: 70
Research-Richtung: Investigate the OneOfField component in react jsonschema form to understand how it renders fields for oneOf schemas. The issue is that when oneOf schemas only contain validation keywords like multipleOf, the form still renders separate fields for each sub schema instead of a single field. Check the playground link for reproduction. Look at the logic that decides whether to render a oneOf selector or just a field. The fix likely involves modifying the rendering logic to detect validation only schemas and avoid rendering extra UI elements.