https://github.com/pointfreeco/sharing-grdb

A lightweight replacement for SwiftData and the Query macro.
https://github.com/pointfreeco/sharing-grdb
persistence sqlite
Last synced: 12 days ago
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A lightweight replacement for SwiftData and the Query macro.
Host: GitHub
URL: https://github.com/pointfreeco/sharing-grdb
Owner: pointfreeco
License: mit
Created: 2024-12-11T22:44:01.000Z (6 months ago)
Default Branch: main
Last Pushed: 2025-05-15T16:33:02.000Z (13 days ago)
Last Synced: 2025-05-15T17:43:22.048Z (13 days ago)
Topics: persistence, sqlite
Language: Swift
Homepage: https://www.pointfree.co
Size: 837 KB
Stars: 476
Watchers: 10
Forks: 15
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE
- Code of conduct: .github/CODE_OF_CONDUCT.md
Awesome Lists containing this project

README

        # SharingGRDB

A lightweight replacement for SwiftData and `@Query`.

[![CI](https://github.com/pointfreeco/sharing-grdb/workflows/CI/badge.svg)](https://github.com/pointfreeco/sharing-grdb/actions?query=workflow%3ACI)

[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fpointfreeco%2Fsharing-grdb%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/pointfreeco/sharing-grdb)

[![](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fpointfreeco%2Fsharing-grdb%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/pointfreeco/sharing-grdb)

* [Learn more](#Learn-more)

* [Overview](#Overview)

* [Demos](#Demos)

* [Documentation](#Documentation)

* [Installation](#Installation)

* [Community](#Community)

* [License](#License)

## Learn more

This library was motivated and designed over the course of many episodes on

[Point-Free](https://www.pointfree.co), a video series exploring advanced programming topics in the

Swift language, hosted by [Brandon Williams](https://twitter.com/mbrandonw) and

[Stephen Celis](https://twitter.com/stephencelis). To support the continued development of this

library, [subscribe today](https://www.pointfree.co/pricing).



  



## Overview

SharingGRDB is lightweight replacement for SwiftData and the `@Query` macro that deploys all the way

back to the iOS 13 generation of targets.

SharingGRDB

SwiftData

      

```swift

@SharedReader(

  .fetchAll(

    sql: "SELECT * FROM items"

  )

)

var items: [Item]

```

```swift

@Query

var items: [Item]

```

Both of the above examples fetch items from an external data store, and both are automatically

observed by SwiftUI so that views are recomputed when the external data changes, but SharingGRDB is

powered directly by SQLite using [Sharing][sharing-gh] and [GRDB][grdb], and is

usable from UIKit, `@Observable` models, and more.

> Note: It is not required to write queries as a raw SQL string, and a query builder can be used 

> instead. For more information on SharingGRDB's querying capabilities, see 

[Fetching model data][fetching-article].

## Quick start

Before SharingGRDB's property wrappers can fetch data from SQLite, you need to provide–at

runtime–the default database it should use. This is typically done as early as possible in your

app's lifetime, like the app entry point in SwiftUI, and is analogous to configuring model storage

in SwiftData:

SharingGRDB

SwiftData

```swift

@main

struct MyApp: App {

  init() {

    prepareDependencies {

      let db = try! DatabaseQueue(

        // Create/migrate a database 

        // connection

      )

      $0.defaultDatabase = db

    }

  }

  // ...

}

```

```swift

@main

struct MyApp: App {

  let container = { 

    // Create/configure a container

    try! ModelContainer(/* ... */)

  }()

  

  var body: some Scene {

    WindowGroup {

      ContentView()

        .modelContainer(container)

    }

  }

}

```

> Note: For more information on preparing a SQLite database, see 

[Preparing a SQLite database][preparing-db-article].

This `defaultDatabase` connection is used implicitly by SharingGRDB's strategies, like 

 [`fetchAll`][fetchall-docs]:

```swift

@SharedReader(.fetchAll(sql: "SELECT * FROM items"))

var items: [Item]

```

And you can access this database throughout your application in a way similar to how one accesses

a model context, via a property wrapper:

SharingGRDB

SwiftData

```swift

@Dependency(\.defaultDatabase) 

var database

    

var newItem = Item(/* ... */)

try database.write { db in

  try newItem.insert(db)

}

```

```swift

@Environment(\.modelContext) 

var modelContext

    

let newItem = Item(/* ... */)

modelContext.insert(newItem)

try modelContext.save()

```

> Note: For more information on how SharingGRDB compares to SwiftData, see

> [Comparison with SwiftData][comparison-swiftdata-article].

This is all you need to know to get started with SharingGRDB, but there's much more to learn. Read

the [articles][articles] below to learn how to best utilize this library:

* [Fetching model data][fetching-article]

* [Observing changes to model data][observing-article]

* [Preparing a SQLite database][preparing-db-article]

* [Dynamic queries][dynamic-queries-article]

* [Comparison with SwiftData][comparison-swiftdata-article]

[observing-article]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/observing

[dynamic-queries-article]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/dynamicqueries

[articles]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb#Essentials

[comparison-swiftdata-article]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/comparisonwithswiftdata

[fetching-article]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/fetching

[preparing-db-article]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/preparingdatabase 

 [fetchall-docs]: https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/sharing/sharedreaderkey/fetchall(sql:arguments:database:animation:)

## SQLite knowledge required

SQLite is one of the 

 [most established and widely distributed](https://www.sqlite.org/mostdeployed.html) pieces of 

software in the history of software. Knowledge of SQLite is a great skill for any app developer to

have, and this library does not want to conceal it from you. So, we feel that to best wield this

library you should be familiar with the basics of SQLite, including schema design and normalization,

SQL queries, including joins and aggregates, and performance, including indices.

With some basic knowledge you can apply this library to your database schema in order to query

for data and keep your views up-to-date when data in the database changes. You can use GRDB's

[query builder][query-interface] APIs to query your database, or you can use raw SQL queries, 

along with all of the power that SQL has to offer.

[query-interface]: https://swiftpackageindex.com/groue/grdb.swift/master/documentation/grdb/queryinterface

[sharing-gh]: http://github.com/pointfreeco/swift-sharing

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

[swift-nav-gh]: https://github.com/pointfreeco/swift-navigation

[observe-docs]: https://swiftpackageindex.com/pointfreeco/swift-navigation/main/documentation/swiftnavigation/objectivec/nsobject/observe(_:)-94oxy

## Demos

This repo comes with _lots_ of examples to demonstrate how to solve common and complex problems with

Sharing. Check out [this](./Examples) directory to see them all, including:

  * [Case Studies](./Examples/CaseStudies):

    A number of case studies demonstrating the built-in features of the library.

  * [SyncUps](./Examples/SyncUps): We also rebuilt Apple's [Scrumdinger][scrumdinger] demo

    application using modern, best practices for SwiftUI development, including using this library

    to query and persist state using SQLite.

    

  * [Reminders](./Examples/Reminders): A rebuild of Apple's [Reminders][reminders-app-store] app

    that uses a SQLite database to model the reminders, lists and tags. It features many advanced

    queries, such as searching, and stats aggregation.

[scrumdinger]: https://developer.apple.com/tutorials/app-dev-training/getting-started-with-scrumdinger

[reminders-app-store]: https://apps.apple.com/us/app/reminders/id1108187841

## Documentation

The documentation for releases and `main` are available here:

* [`main`](https://swiftpackageindex.com/pointfreeco/sharing-grdb/main/documentation/sharinggrdb/)

* [0.1.x](https://swiftpackageindex.com/pointfreeco/sharing-grdb/~/documentation/sharinggrdb/)

## Installation

You can add SharingGRDB to an Xcode project by adding it to your project as a package.

> https://github.com/pointfreeco/sharing-grdb

If you want to use SharingGRDB in a [SwiftPM](https://swift.org/package-manager/) project, it's as

simple as adding it to your `Package.swift`:

``` swift

dependencies: [

  .package(url: "https://github.com/pointfreeco/sharing-grdb", from: "0.1.0")

]

```

And then adding the product to any target that needs access to the library:

```swift

.product(name: "SharingGRDB", package: "sharing-grdb"),

```

## Community

If you want to discuss this library or have a question about how to use it to solve a particular

problem, there are a number of places you can discuss with fellow

[Point-Free](http://www.pointfree.co) enthusiasts:

  * For long-form discussions, we recommend the

    [discussions](http://github.com/pointfreeco/sharing-grdb/discussions) tab of this repo.

  * For casual chat, we recommend the

    [Point-Free Community Slack](http://www.pointfree.co/slack-invite).

## License

This library is released under the MIT license. See [LICENSE](LICENSE) for details.
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