https://github.com/groue/grdbquery

The SwiftUI companion for GRDB
https://github.com/groue/grdbquery

database database-observation grdb sqlite swiftui

Last synced: 13 days ago
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The SwiftUI companion for GRDB

• Host: GitHub
• URL: https://github.com/groue/grdbquery
• Owner: groue
• License: mit
• Created: 2021-11-25T13:00:36.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2024-01-17T07:24:59.000Z (10 months ago)
• Last Synced: 2024-05-02T00:54:04.085Z (7 months ago)
• Topics: database, database-observation, grdb, sqlite, swiftui
• Language: Swift
• Homepage:
• Size: 1.94 MB
• Stars: 189
• Watchers: 5
• Forks: 12
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Funding: .github/FUNDING.yml

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README

        
# GRDBQuery

**Latest release**: September 29, 2024 • [version 0.10.1](https://github.com/groue/GRDBQuery/tree/0.10.1) • [CHANGELOG](CHANGELOG.md)

**Requirements**: iOS 14.0+ / macOS 11+ / tvOS 14.0+ / watchOS 7.0+ • Swift 6+ / Xcode 16+

📖 **[Documentation]**

---

GRDBQuery helps SwiftUI applications access a local SQLite database through [GRDB] and the SwiftUI environment.

It comes in two flavors:

- The `@Query` property wrapper allows SwiftUI views to directly read and observe the database:

    ```swift

    /// Displays an always up-to-date list of database players.

    struct PlayerList: View {

        @Query(PlayersRequest()) var players: [Player]

        

        var body: some View {

            List(players) { player in Text(player.name) }

        }

    }

    ```

- The `@EnvironmentStateObject` property wrapper helps building `ObservableObject` models from the SwiftUI environment:

    ```swift

    /// Displays an always up-to-date list of database players.

    struct PlayerList: View {

        @EnvironmentStateObject var model: PlayerListModel = []

        

        init() {

            _model = EnvironmentStateObject { env in

                PlayerListModel(databaseContext: env.databaseContext)

            }

        }

        

        var body: some View {

            List(model.players) { player in Text(player.name) }

        }

    }

    ```

Both techniques can be used in a single application, so that developers can run quick experiments, build versatile previews, and also apply strict patterns and conventions. Pick `@Query`, or `@EnvironmentStateObject`, depending on your needs!

## Documentation

Learn how to use `@Query` and `@EnvironmentStateObject` in the **[Documentation]**.

Check out the **[GRDBQuery demo apps]**, and the **[GRDB demo apps]** for various examples.

## Thanks

🙌 `@Query` was vastly inspired from [Core Data and SwiftUI](https://davedelong.com/blog/2021/04/03/core-data-and-swiftui/) by [@davedelong](https://github.com/davedelong), with [a critical improvement](https://github.com/groue/GRDB.swift/pull/955) contributed by [@steipete](https://github.com/steipete), and enhancements inspired by conversations with [@stephencelis](https://github.com/stephencelis). Many thanks to all of you!

[GRDB]: http://github.com/groue/GRDB.swift

[GRDB demo apps]: https://github.com/groue/GRDB.swift/tree/master/Documentation/DemoApps

[Documentation]: https://swiftpackageindex.com/groue/GRDBQuery/documentation

[GRDBQuery demo apps]: Documentation