What’s new in swift data?
Asked on 2024-07-30
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What's New in Swift Data
Swift Data has introduced several new features and improvements to enhance its capabilities for modeling and persisting app data. Here are the key updates:
-
Custom Data Stores:
- Swift Data now supports custom data stores, allowing you to use alternative backends like SQLite, remote web services, or even collections of JSON files. This flexibility enables the use of Swift Data's API with various storage solutions (Platforms State of the Union).
-
Schema Macro:
- A new schema macro helps avoid duplicate models, making it easier to set up and configure model containers (What’s new in SwiftData).
-
Index and Unique Macros:
- The
index
macro improves query efficiency by indicating which properties are commonly queried together. - The
unique
macro ensures that a set of properties has no duplicate entries (Platforms State of the Union).
- The
-
History API:
- Swift Data now provides access to the history of changes in a datastore, making it easy to inspect recent changes. This is particularly useful for tracking local changes that need to be synced to a remote web service (Platforms State of the Union).
-
Model Container Configuration:
- New ways to set up and configure model containers have been introduced, allowing for more tailored data management (What’s new in SwiftData).
-
Query Optimization:
- Complex filters and a new macro to improve performance have been added to optimize queries (What’s new in SwiftData).
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Previewable Macro:
- The new
previewable
macro works well with Swift Data, making it easier to work with queries while iterating on views (Platforms State of the Union).
- The new
Relevant Sessions
- Platforms State of the Union
- What’s new in SwiftData
- Create a custom data store with SwiftData
- Track model changes with SwiftData history
These sessions provide a comprehensive overview of the new features and improvements in Swift Data.

Track model changes with SwiftData history
Reveal the history of your model’s changes with SwiftData! Use the history API to understand when data store changes occurred, and learn how to use this information to build features like remote server sync and out-of-process change handing in your app. We’ll also cover how you can build support for the history API into a custom data store.

Create a custom data store with SwiftData
Combine the power of SwiftData’s expressive, declarative modeling API with your own persistence backend. Learn how to build a custom data store and explore how to progressively add persistence features in your app. To get the most out of this session, watch “Meet SwiftData” and “Model your schema with SwiftData” from WWDC23.

What’s new in Swift
Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.