CloudKit - Cannot create or modify field 'CD_nameFirstChar' in record 'CD_Charts' in production schema

App & System Services iCloud & Data
cliffr OP
Created Apr ’24
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Some of my users are reporting an inability to sync via CloudKit between devices. I have not seen it on any of my devices, but one user got me some console logs that are showing the following error:

<CKError 0x600000a0f840: "Partial Failure" (2/1011); "Failed to modify some records"; uuid = EDC7B3E3-02F8-43B7-83B6-22D17EF0442A; container ID = "iCloud.cribaudo.iphemeris"; partial errors: { C611E11F-3DC0-484C-8FC1-23473062D9D0:(com.apple.coredata.cloudkit.zone:defaultOwner) = <CKError 0x600000a04660: "Invalid Arguments" (12/2006); server message = "Cannot create or modify field 'CD_nameFirstChar' in record 'CD_Charts' in production schema"; op = D83EF1F7DD772042; uuid = EDC7B3E3-02F8-43B7-83B6-22D17EF0442A>

I do not understand this:

  • The field CD_nameFirstChar was added to the data model in the version 15.
  • Automatic Migration is enabled.
  • The CloudKit Console says the Private Database Container being used by my App is deployed to production.
  • The entity CD_Charts (I only have one) that is deployed to production shows that field as present (CD_nameFirstChar).

  1. Why would this user be getting this error? As far as I can see they are running a version where migration to Model 15 should have been triggered at some point in the past.

  2. If somehow something went wrong with their migration, how would I fix it?

Any thoughts / ideas are appreciated.

One thing I should add is that the migration from Model 14 to 15 was not lightweight. I did use:

@interface ModelMigration14to15 : NSEntityMigrationPolicy
-(NSString *)nameFirstChar:(NSString *)name;
@end

And I used a MapModel14to15 which used the above function to set the value of nameFirstChar. The Value Expression for that attribute is:

FUNCTION($entityPolicy,` "nameFirstChar:" , $source.name)

from the above mentioned NSEntityMigrationPolicy class.

This worked ok on all my devices and apparently on some user devices. This issues seems to effect only a small subset of my users but not all? So I am at a loss to understand why this would happen or how to fix it.

Answered by Frameworks Engineer in 784707022

Typically this means you never updated the production schema with CD_nameFirstChar.

https://developer.apple.com/documentation/coredata/mirroring_a_core_data_store_with_cloudkit/creating_a_core_data_model_for_cloudkit

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Frameworks Engineer OP
Apple
Apr ’24
Accepted Answer

Typically this means you never updated the production schema with CD_nameFirstChar.

https://developer.apple.com/documentation/coredata/mirroring_a_core_data_store_with_cloudkit/creating_a_core_data_model_for_cloudkit

1
cliffr OP
Apr ’24

The CloudKit Console says the development schema and which has the field nameFirstChar field is indicated as deployed to production. However I DO NOT see it over on the production side. See the images. How is this possible and or what am I missing? The data is syncing just fine on all my devices and perhaps some users ... I think. And I ran this code at various points to deploy development to production:

    func initializeCloudKitSchemaForNewModel()
    {
        coreDataLogger.log("*** Initialize CloudKit Scheme for New Model - Start")
        if(!useiCloud) { return }
        do {
            // Use the container to initialize the development schema.
            let options = NSPersistentCloudKitContainerSchemaInitializationOptions()
            try pc.initializeCloudKitSchema(options:options)
        }
        catch {
            coreDataLogger.error("*** CoreDataUtil Initializing new schema: \(error)")
        }
        coreDataLogger.log("*** Initialize CloudKit Scheme for New Model - End")
    }

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CloudKit - Cannot create or modify field 'CD_nameFirstChar' in record 'CD_Charts' in production schema
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