Sp-dev-fx-webparts: React list form: Getting an 'TypeError: Cannot read property 'indexOf' of undefined' when trying to load some list forms

[JenniferUXWeb]

Authors:
@sharepointknight
@Harshagracy
@DanyWyss

Issue:

I've recently noticed that some of my react list forms are no longer loading and I'm getting the following error 'TypeError: Cannot read property 'indexOf' of undefined' when trying to load some list forms'.

This error began to occur after I deployed the most recent update of the SPFX web part. It's really strange because it only seems to be affecting a handful of my forms and I can't quite pin-point what is triggering the error. The majority of my forms are working as expected.

Any help would be much appreciated.

Steps to reproduce the error:

• Deploy latest React List Form release
• Open an existing SharePoint Modern page with React List form web part
• Delete web part and re-add to the page
• Choose list from options
• Error message appears in web part (only affects some lists).

[msftbot[bot]]

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[bcameron1231]

hi, are you able to provide the definitions for your list which would help us reproduce the issue?

[sharepointknight]

I believe I have fixed this in the other fixes I am working on. I believe it is related to different handling of Lookup fields by SharePoint. I'll make sure this fix gets committed shortly.

[bcameron1231]

Thanks @sharepointknight . I assigned this to you so it doesn't get lost 👍

[JenniferUXWeb]

I believe I have fixed this in the other fixes I am working on. I believe it is related to different handling of Lookup fields by SharePoint. I'll make sure this fix gets committed shortly.

Once again, thank you so soo much @sharepointknight your hard work and efforts are very much appreciated!!!

[benkenawell]

Hi @sharepointknight , is this related to the Lookup columns no longer returning a Choices field in the sharepoint api call? I've had a similar issue in a webpart for my day job and I'd be happy to help with this issue if they're similar.