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💡Rules for Adapting Data Models to CloudKit
TL;DR: When using CloudKit with Core Data or SwiftData, avoid unique constraints, undefined types, and non-optional attributes without defaults. Relationships must be optional and have inverse settings. Use lightweight migrations for adjustments, adhering to “add-only” changes.
Background
When using Core Data or SwiftData for cloud synchronization, failing to consider CloudKit’s limitations during the modeling phase can lead to complex issues later. Below are the essential rules and considerations to ensure smooth integration with CloudKit.
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