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Convenience extension for running ModelActor code in the background
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| extension ModelContainer { | |
| // non-throwing version | |
| nonisolated func runNonisolated<ResultType, ActorType: InitWithModelContainer>( | |
| action: @Sendable (_ actor: ActorType) async -> ResultType | |
| ) async -> ResultType { | |
| let actor = ActorType(modelContainer: self) | |
| let result = await action(actor) | |
| return result | |
| } | |
| // throwing version | |
| nonisolated func runNonisolated<ResultType, ActorType: InitWithModelContainer>( | |
| action: @Sendable (_ actor: ActorType) async throws -> ResultType | |
| ) async throws -> ResultType { | |
| let actor = ActorType(modelContainer: self) | |
| let result = try await action(actor) | |
| return result | |
| } | |
| } | |
| protocol InitWithModelContainer { | |
| init(modelContainer: ModelContainer) | |
| } | |
| // MARK: - Usage: | |
| // Conform your @ModelActor to InitWithModelContainer (nothing needs to be implemented, the macro does it) | |
| @ModelActor | |
| actor StudyStatsActor: InitWithModelContainer { | |
| func stats(forMonth:) … | |
| } | |
| // Calling runNonisolated (in this case, from a MainActor task): | |
| .task { | |
| // closure must be sendable | |
| self.stats = await modelContext.container.runNonisolated { (actor: StudyStatsActor) in | |
| await actor.stats(forMonth: self.month, in: calendar) | |
| } | |
| } |
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