Swiftdata - reset the database from archived files with swiftui without a app restart

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Created Feb ’25

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HI, swiftdata is new to me and any help would be appreciated. In my swiftui app I have a functionality that reinstates the database from an archive. I first move the three database files (database.store datebase.store-wal and database.store-shm) to a new name (.tmp added for backup incase) and then copy the Archived three files to the same location. the move creates the following errors:

" BUG IN CLIENT OF libsqlite3.dylib: database integrity compromised by API violation: vnode renamed while in use: /private/var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store.tmp invalidated open fd: 4 (0x20)"

I get the same message in console for all three files. then I reinitialise the model container and get no errors as my code below .... let schema = Schema([....my different models are here]) let config = ModelConfiguration("database", schema: schema) do { // Recreate the container with the same store URL let container = try ModelContainer(for: schema, configurations: config) print("ModelContainer reinitialized successfully!") } catch { print("Failed to reinitialize ModelContainer: (error)") } }

I get the success message but when I leave the view (backup-restore view) to the main view I get:

CoreData: error: (6922) I/O error for database at /var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store. SQLite error code:6922, 'disk I/O error' and error: SQLCore dispatchRequest: exception handling request: <NSSQLFetchRequestContext: 0x302920460> , I/O error for database at /var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store. SQLite error code:6922, 'disk I/O error' with userInfo of { NSFilePath = "/var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store"; NSSQLiteErrorDomain = 6922; } error: -executeRequest: encountered exception = I/O error for database at /var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store. SQLite error code:6922, 'disk I/O error' with userInfo = { NSFilePath = "/var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store"; NSSQLiteErrorDomain = 6922; } CoreData: error: SQLCore dispatchRequest: exception handling request: <NSSQLFetchRequestContext: 0x302920460> , I/O error for database at /var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store. SQLite error code:6922, 'disk I/O error' with userInfo of { NSFilePath = "/var/mobile/Containers/Data/Application/499A6802-02E5-4547-83C4-88389AEA50F5/Library/Application Support/database.store"; NSSQLiteErrorDomain = 6922; }

Can anyone let me know how I should go about this - reseting the database from old backup files by copying over them. or if there is a way to stop the database and restart it with the new files in swiftdata

my app is an ios app for phone and ipad

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Answer 1

DTS Engineer OP

Apple

Feb ’25

Recommended

... but when I leave the view (backup-restore view) to the main view I get: CoreData: error ...

I believe that was because your main view hierarchy still used models or a model context tied to the orignal model container instance.

You can try to reload all the SwiftUI views that use SwiftData models after re-creating the model container, which typically means that you manage a SwiftUI state, and change it after re-creating the container, which tells SwiftUI to reload the whole view hierarchy that use SwiftData.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

1

Answer 2

Farzam OP

Feb ’25

Thank you for your reply, and I agree that is what is happening. I do the following - reloading reinitialise the model container and get no errors as my code below .... let schema = Schema([....my different models are here]) let config = ModelConfiguration("database", schema: schema) do { // Recreate the container with the same store URL let container = try ModelContainer(for: schema, configurations: config) print("ModelContainer reinitialized successfully!") } catch { print("Failed to reinitialize ModelContainer: (error)") } } maybe I will create a function and places in the contentview view (the main view that initially creates the container) and change it to have a reload that will reset the container and as it is passed in the environment should get reloaded. thanks

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