axiom-sqlitedata

SQLiteData

Overview

Type-safe SQLite persistence using SQLiteData (pointfreeco/sqlite-data) by Point-Free. A fast, lightweight replacement for SwiftData with CloudKit synchronization support, built on GRDB (groue/GRDB.swift) and StructuredQueries (pointfreeco/swift-structured-queries).

Core principle: Value types (struct) + @Table macro + database.write { } blocks for all mutations.

For advanced patterns (CTEs, views, custom aggregates, schema composition), see the axiom-sqlitedata-ref reference skill.

Requires: iOS 17+, Swift 6 strict concurrency License: MIT

When to Use SQLiteData

Choose SQLiteData when you need:

• Type-safe SQLite with compiler-checked queries
• CloudKit sync with record sharing
• Large datasets (50k+ records) with near-raw-SQLite performance
• Value types (structs) instead of classes
• Swift 6 strict concurrency support

Use SwiftData instead when:

• Simple CRUD with native Apple integration
• Prefer @Model classes over structs
• Don't need CloudKit record sharing

Use raw GRDB when:

• Complex SQL joins across 4+ tables
• Custom migration logic beyond schema changes
• Performance-critical operations needing manual SQL

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Quick Reference

// MODEL
@Table nonisolated struct Item: Identifiable {
    let id: UUID                    // First let = auto primary key
    var title = ""                  // Default = non-nullable
    var notes: String?              // Optional = nullable
    @Column(as: Color.Hex.self)
    var color: Color = .blue        // Custom representation
    @Ephemeral var isSelected = false  // Not persisted
}

// SETUP
prepareDependencies { $0.defaultDatabase = try! appDatabase() }
@Dependency(\.defaultDatabase) var database

// FETCH
@FetchAll var items: [Item]
@FetchAll(Item.order(by: \.title).where(\.isInStock)) var items
@FetchOne(Item.count()) var count = 0

// FETCH (static helpers - v1.4.0+)
try Item.fetchAll(db)              // vs Item.all.fetchAll(db)
try Item.find(db, key: id)         // returns non-optional Item

// INSERT
try database.write { db in
    try Item.insert { Item.Draft(title: "New") }.execute(db)
}

// UPDATE (single)
try database.write { db in
    try Item.find(id).update { $0.title = #bind("Updated") }.execute(db)
}

// UPDATE (bulk)
try database.write { db in
    try Item.where(\.isInStock).update { $0.notes = #bind("") }.execute(db)
}

// DELETE
try database.write { db in
    try Item.find(id).delete().execute(db)
    try Item.where { $0.id.in(ids) }.delete().execute(db)  // bulk
}

// QUERY
Item.where(\.isActive)                     // Keypath (simple)
Item.where { $0.title.contains("phone") }  // Closure (complex)
Item.where { $0.status.eq(#bind(.done)) }  // Enum comparison
Item.order(by: \.title)                    // Sort
Item.order { $0.createdAt.desc() }         // Sort descending
Item.limit(10).offset(20)                  // Pagination

// RAW SQL (#sql macro)
#sql("SELECT * FROM items WHERE price > 100")  // Type-safe raw SQL
#sql("coalesce(date(\(dueDate)) = date(\(now)), 0)")  // Custom expressions

// CLOUDKIT (v1.2-1.4+)
prepareDependencies {
    $0.defaultSyncEngine = try SyncEngine(
        for: $0.defaultDatabase,
        tables: Item.self
    )
}
@Dependency(\.defaultSyncEngine) var syncEngine

// Manual sync control (v1.3.0+)
try await syncEngine.fetchChanges()  // Pull from CloudKit
try await syncEngine.sendChanges()   // Push to CloudKit
try await syncEngine.syncChanges()   // Bidirectional

// Sync state observation (v1.2.0+)
syncEngine.isSendingChanges    // true during upload
syncEngine.isFetchingChanges   // true during download
syncEngine.isSynchronizing     // either sending or fetching