Unable to input formData for oneOf while omitExtraData and liveOmit is set to true

[maksymt1]

Prerequisites

• I have read the documentation;
• In the case of a bug report, I understand that providing a SSCCE example is tremendously useful to the maintainers.
• Ideally, I'm providing a sample JSFiddle or a shared playground link demonstrating the issue.

Description

Unable to input formData for oneOf while omitExtraData and liveOmit is set to true
ex: https://rjsf-team.github.io/react-jsonschema-form/#eyJmb3JtRGF0YSI6e30sInNjaGVtYSI6eyJ0eXBlIjoib2JqZWN0Iiwib25lT2YiOlt7InByb3BlcnRpZXMiOnsibG9yZW0iOnsidHlwZSI6InN0cmluZyJ9fSwicmVxdWlyZWQiOlsibG9yZW0iXX0seyJwcm9wZXJ0aWVzIjp7Imlwc3VtIjp7InR5cGUiOiJzdHJpbmcifX0sInJlcXVpcmVkIjpbImlwc3VtIl19XX0sInVpU2NoZW1hIjp7fSwidGhlbWUiOiJkZWZhdWx0IiwibGl2ZVNldHRpbmdzIjp7InZhbGlkYXRlIjpmYWxzZSwiZGlzYWJsZSI6ZmFsc2UsIm9taXRFeHRyYURhdGEiOnRydWUsImxpdmVPbWl0Ijp0cnVlfX0=

Steps to Reproduce

1. Select oneOf schema example
2. Select omitExtraData and liveOmit
3. Attempt to input data

Expected behavior

Data is inputted

Actual behavior

Nothing happens

Version

2.4.2

[NixBiks]

Same here... Which is a problem since shared fields are not resetting with anyOf/oneOf without this option. See #1819

[maksymt1]

The problem seems to be coming from here:
const fieldNames = this.getFieldNames(pathSchema, formData);
or
newFormData = this.getUsedFormData(formData, fieldNames);

fieldNames is [] and let data = _pick(formData, fields); in getUsedFormData returns []

It looks like changing
if (fields.length === 0 && typeof formData !== "object") { return formData; }
to
if (fields.length === 0) { return formData; }
in getUsedFormData works but i haven't been able to test this out properly as I'm not sure about the functionality of the code/original purpose and unfortunately i haven't had the time to dig in more.

[maksymt1]

Looking into it more it looks like the

-toPathSchema() ignores the properties contained in oneOf
-because of this fieldNames doesn’t load the names in oneOf

-and getUsedFormData() filters out the required fields

[xyy7260]

@maksymt1 hi， Do you use omitextradata and liveomit to delete extra form data values that are not in the form fields?

[knjoeyn]

Hi @xyy7260 we are hitting this issue as well and yes, we are using omitextradata and liveomit to delete extra form data values that are not in the form fields.