swiftdata

To set up SwiftData persistence, initialize a ModelContainer with your schema and inject it into your SwiftUI view hierarchy. This configures the app's data store, supporting options like CloudKit sync or in-memory storage for previews.

Querying data in SwiftData uses the @Query property wrapper with #Predicate to declaratively fetch and filter records directly in SwiftUI views. This mechanism provides type-safe, expressive data fetching without manual fetch requests.

The best way to handle SwiftData schema migration is using VersionedSchema and SchemaMigrationPlan. These mechanisms allow you to define staged schema versions and execute custom migration logic to gracefully evolve your database.

SwiftData handles background concurrency safely using the @ModelActor macro. This isolates data operations in background threads, ensuring safe ModelContext access without race conditions during intensive data tasks.

Defining SwiftData models uses the @Model macro with @Attribute and @Relationship annotations. This specifies persistent properties, unique constraints, and relational mappings between data classes for reliable storage.

SwiftData offers modern, macro-driven data persistence with direct SwiftUI integration via @Query, reducing Core Data boilerplate. It provides type-safe predicates and simplified ModelContainer setup while retaining robust migration capabilities.