I like your approach. Functionally your code looks good, just pointing out some minor code smells.

Looks good, nice work!

• Verify that it selects the proper COT regardless of the Catalog Number format

Looks good!

• Verify that it selects the proper COT regardless of the Catalog Number format

Works as expected!

Nice work on this! I really like the implementation; pretty clever idea! 🚀

I will mention that while the CollectionObjectType the user selects while the page is loaded will always be respected, it will always revert to the first CollectionObjectType in the list with the same format when re-rendered!

This is because only the format name (nothing of the CollectionObjectType) is saved to the SpQueryField in the database; when the page is rendered initially, it isn't formatted with the formatterSeparator and index and is just the name of the formatter itself.
So Specify has no clue which CollectionObjectType it can be referring to.

There's also a somewhat smaller Issue where changing the CollectionObjectType to another which shares the same format doesn't trigger a change on the field (because nothing has actually changed on the SpQueryField!)

We're relatively having a lot of Issues regarding this feature (#6239, #6253, etc. no thanks to my initial implementation in the first place!), and I think that's usually an indicator to take a step back and re-evaluate the core problem and potential solutions.

@specify/ux-testing, @specify/dev-testing

Instead of having a separate option for each CollectionObjectType, could we instead have an option for each Format and have the title of the option be a combination of all the COT names with that format?

It could look something like this:

Or we can go even more descriptive to try and be as clear as possible: the user isn't selecting/filtering on COT, they're only applying a different formatter for the field:

Alternatively, we could move away from the SpQueryField -> FormatName approach entirely and come up with something different which would allow the user to select an individual COT name.

• Verify that it selects the proper COT regardless of the Catalog Number format

Looks good! I ran into an issue where the query results were incorrect (I set the filter to equal and instead it showed all results), I couldn't recreate it but I would love if we could get one more testing review to verify that it is not an issue

• Verify that it selects the proper COT regardless of the Catalog Number format=

Looks good!

@emenslin I didn't run into what you mentioned, it's working on my end!

Nice work!
Coming along nicely 👌