Sections not updated after switching type

[SMillerDev]

Note

Maybe I'm just holding it wrong so please bear with me

I tried to switch my app to this library in SMillerDev/Fosdem#18, but it seems like it's not updating.
The app has a picker that changes the type as defined in EventList.swift.
The init gets called when I change the type value, and the body gets recalculated, but the sections never change.

Am I doing something wrong in the setup of the library, or is this a bug?

[Whiffer]

I'm not sure I fully understand what you are trying to do, but it is very important that your sectionIdentifier and your sortDescriptors are in sync with your intensions. It looks like you are changing the sectionIdentifier (your key), but not changing the sortDescriptors to match. The primary key you sort by creates your groups. If you want to section your results by \Event.room, then your primary sort key must be \Event.room. If you then want the events in each room's section to be sorted by \Event.start, then you would need a secondary sortDescriptor for \Event.start. Does this help?

[SMillerDev]

Whoops, that link to the file was on the wrong branch. So your comment at least helped me realise that.
https://github.com/SMillerDev/Fosdem/blob/feat/rework_list/Fosdem/Views/Lists/EventList.swift is the branch that uses this library.

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What I'm trying to do is: if the type changes I want the sections to change to be based on a different key.

[Whiffer]

This should be possible, but it may be the manner that you re injecting the key change that doesn’t work. I will try to make a change to my sample program that will demonstrate how to do this.

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On Jan 28, 2025, at 12:25 AM, Sean Molenaar ***@***.***> wrote: Whoops, that link to the file was on the wrong branch. So your comment at least helped me realise that. https://github.com/SMillerDev/Fosdem/blob/feat/rework_list/Fosdem/Views/Lists/EventList.swift is the branch that uses this library. What I'm trying to do is: if the type changes I want the sections to change to be based on a different key. — Reply to this email directly, view it on GitHub <#5 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABE2LJY7QMWPE5LKGC5GNF32M45ILAVCNFSM6AAAAABV63SJLOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMJYGIZDKMRVGM>. You are receiving this because you commented.

[SMillerDev]

That would be amazing, thanks!

[Whiffer]

I added code to the sample app to demonstrate that it is possible to dynamically change the sectionIdentifier.

However, in your case, you need to make sure SwiftUI can detect your 'key' and 'terms' changes by making them @State (or equivalent) vars. I have started using @observable objects with @Environment to make sure all of my views get updated as expected.