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Reply to NSFetch Request return sum over computed properties
If you're using the SQLite persistent store, then that code won't work at all. The limitation is caused by CoreData pushing the processing of the request to the database engine but the database engine can't see the "software implemented" properties. This took me several hours of searching to find, thank you for the explanation! For reference, I was attempting to create a SortDescriptor based on a computed property on a CoreData entity. Here are a few breadcrumbs for the next person: Core Data: Fatal Error sorting using a computed property Creating a SortDescriptor in Swift from a computed property on a CoreData entity Error message - keypath not found in entity with userinfo of (null) Must be introspectable by the objective-c runtime
Oct ’22
Reply to Mac (designed for iPad) builds but does not run - "This application requires a newer version of macOS." but I am on the latest version
Hi Jason, thanks for the quick reply! Here are the vitals: macOS Version 12.6.2 (Build 21G320) Xcode 14.2 (21534) (Build 14C18) Timestamp: 2023-01-09T08:42:44-08:00 I can successfully target and run on 16.0, so I don't believe I'm using any 16.2 APIs. I am of course using plenty of what's new in SwiftUI this year ;) This is the content of the dialog that appears: Unable To Install “<your bundle>” This application requires a newer version of macOS. The system version is lower than the minimum OS version specified for bundle at /var/db/appinstalld/Library/Caches/com.apple.mobile.installd.staging/temp.U90CDi/extracted/<app name>.app. Have 15.7; need 16.0 [ DETAILS ] [ OK ] ```
Jan ’23
Reply to Notify when @FetchRequest changes?
I'm sure I'm going to hose the Combine terminology... but onReceive takes anything that conforms to Publisher. Trigger an auto-complete after the publisher to see what I mean. In your case, collect() seems like what you want? Collects all received elements, and emits a single array of the collection when the upstream publisher finishes. I'm looking to be notified when any change occurs, but not of the individual items. collect() is perfect for me. Someone with actual Combine knowledge can likely offer something better :)
Jan ’23