guide-swiftdata

Prevent SwiftData predicate runtime crashes by reviewing queries against SwiftData-safe predicate rules, avoiding unsupported patterns that trigger failures. This validates filters before execution to ensure safe data fetching.

Yes, SwiftData supports CloudKit constraints and indexing, with indexing available on iOS 18+ and class inheritance patterns on iOS 26+. You must apply platform-aware best practices to ensure your models match specific OS version capabilities.

The best way to model SwiftData relationships and delete rules is to follow modern SwiftData conventions that enforce autosave behavior and relationship safety. This prevents data corruption by ensuring cascading deletes behave predictably.

You should avoid Core Data and third-party frameworks with SwiftData models unless absolutely unavoidable. The platform enforces SwiftData-first conventions to ensure safe, modern model definitions without relying on legacy persistence solutions.

Implement SwiftData model class inheritance on iOS 26+ by reviewing your definitions against class-inheritance references. This ensures your subclassing patterns comply with modern SwiftData structural constraints and runtime expectations on supported OS versions.

SwiftData queries fail when using unsupported predicate patterns that violate core runtime safety rules. You must review predicates against SwiftData-safe references to identify and replace dangerous filtering logic that causes execution failures.