SwiftData and CloudKit not synching between devices

Our general set of debugging / inspection Tech Notes are:

• https://developer.apple.com/documentation/technotes/tn3163-understanding-the-synchronization-of-nspersistentcloudkitcontainer
• https://developer.apple.com/documentation/technotes/tn3162-understanding-cloudkit-throttles
• https://developer.apple.com/documentation/technotes/tn3164-debugging-the-synchronization-of-nspersistentcloudkitcontainer

Just to add that SwiftData + CloudKit uses NSPersistentCloudKitContainer under the hood, and so the technotes my colleague mentioned apply to your topic. Specifically, you can use CloudKit Console to determine if the data is synchronized to CloudKit. From there, you can determine if the issue happens on the exporting or importing side, and go ahead to capture and analyze a sysdiagnose, as described in the Capture and analyze a sysdiagnose section.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

How can I check if the data is actually stored in the cloud

https://icloud.developer.apple.com/dashboard

The steps are detailed here in the mentioned technote section.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

Thanks for all the advice! I just checked in the dashboard and even there I cannot even see the schema or any record types of my SwiftData model. The only record type that exists is "Users".

I have already created a new container but that does not seem to make any difference. What could the reason be that not even the data model is pushed to CloudKit?

I believe I found the root cause: I had 2 entitlements files, one called

ExpensesTest.entitlements

and the other

ExpensesTestRelease.entitlements

The latter had the information about the CloudKit container in it while the other was missing those entries. After creating a new container and adding those values manually to

ExpensesTest.entitlements

it nows works like a charm again.