Async validation

[SeverinAlexB]

Is your feature request related to a problem? Please describe.
I ask the user for an account id. I like to validate this id by checking it against the db which I can't do sync.

Describe the solution you'd like
Make validate compatible with async.

Describe alternatives you've considered
Currently I load all the accounts before the prompt so I can validate the id sync. This doesn't scale though.

Additional context
That's it :)

[ulken]

Sounds reasonable. I'll have a looksy later.

[ulken]

Follow-up to keep you in the loop: I started looking into this, but quickly realized we need to provide feedback to the user while waiting.

Not entirely obvious how that would fit into the current implementation flow. Asked for input, but haven't gotten any, yet.

[SeverinAlexB]

Thx. I see your point. It is already worth having it without a spinner IMO. Most validation flows should be quick (db calls are in the ms). But I understand in case you want to have it perfect.

[ulken]

Progress has been made. Have some rough edges to smooth out.

[jycouet]

How/where could we enjoy this progress? :)

[stordahl]

Would love to see this ship 🙏

[dylang]

I appreciate your prioritization on human interaction, but for my particular usage it would be helpful to have the ability to use async validators, even with no visual progress indicator, rather than no async support at all.