[Due for payment 2026-03-04] [Onyx Audit] Remove canBeMissing from useOnyx

Coming from #71202.

In order to simplify useOnyx API (and consequently Onyx) let's work on proposing the removal of some configurations we think are anti-patterns / unnecessary at this point.

The canBeMissing configuration logs an alert (also Growl alert in dev) if Onyx returns undefined for that subscribed key. It is purely for identifying cases where useOnyx should be returning data but it isn’t. I don’t think we ever invested in actually track down these missing data logs that are sent to BE, and most of the time its purpose is being bypassed by contributors.

I assume that at this point it’s pretty useless and we could raise a discussion to propose removing it.

I assume that at this point it’s pretty useless and we could raise a discussion to propose removing it.

Let's discuss this with Ionatan for sure

Got approval from Ionatan last week.

I will prepare a proposal this week.

Updates:

Posted proposal for internal review.

Updates:

Posted proposal for external review -> https://expensify.slack.com/archives/C08CZDJFJ77/p1770828347278359

Updates:

Proposal was accepted.
WIP Draft PR is up -> Remove canBeMissing option from Onyx react-native-onyx#734

Updates:

Onyx PR is ready to review -> Remove canBeMissing option from Onyx react-native-onyx#734
Also created the future E/App PR for testing -> [No QA] Bump Onyx to 3.0.38 / Remove canBeMissing usage from the codebase #82467

Updates:

Updated Onyx PR with main and addressed comments, waiting for final review.

@mountiny

@mountiny Sorry, could we reopen it? I forgot to remove https://github.com/Expensify/eslint-config-expensify/blob/main/eslint-plugin-expensify/provide-canBeMissing-in-useOnyx.js from eslint-config-expensify. Will raise a quick PR on Monday.

thanks!

@mountiny

@mountiny PR -> Expensify/eslint-config-expensify#182

@fabioh8010

@fabioh8010, @mountiny Whoops! This issue is 2 days overdue. Let's get this updated quick!

@fabioh8010

@fabioh8010, @mountiny Uh oh! This issue is overdue by 2 days. Don't forget to update your issues!

@fabioh8010

@fabioh8010, @mountiny Still overdue 6 days?! Let's take care of this!

@fabioh8010

@fabioh8010, @mountiny 8 days overdue is a lot. Should this be a Weekly issue? If so, feel free to change it!

@tgolen

@tgolen everything here is done now, could you close it? Thanks

Actually I can close myself :D

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[Due for payment 2026-03-04] [Onyx Audit] Remove canBeMissing from useOnyx #80095

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[Due for payment 2026-03-04] [Onyx Audit] Remove canBeMissing from useOnyx #80095

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mountiny commented on Jan 21, 2026

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