rjsf-team/react-jsonschema-form

oneOf + const enums do not use empty string title

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#4448 opened on Jan 13, 2025

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any-one-all-ofbughelp wanted

Description

Prerequisites

What theme are you using?

core

Version

5.x

Current Behavior

We can define an enum with oneOf:

{
      "oneOf": [
        {
          "const": "empty",
          "title": ""
        },
        {
          "const": "active"
        }
      ]
}

But if the title is an empty string, the const value is used.

Expected Behavior

The empty string option is used instead of falling back to the const value.

Steps To Reproduce

Playground link

Environment

No response

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.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
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
ReactTypeScriptJSON Schema basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
Start by examining the provided playground link to understand the schema and expected behavior. Locate the code that renders enum options with titles, likely in `EnumWidget` or `SchemaField`. Look for a condition like `title || const` that incorrectly replaces an empty string title with the const value. Adjust the logic to preserve the empty string title when explicitly set.