How to add multiple configurations to a ModelContainer 관련

SwiftData by Example

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How to add multiple configurations to a ModelContainer | SwiftData by Example

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How to add multiple configurations to a ModelContainer

Updated for Xcode 15

For more advanced SwiftData setups, it’s possible to send multiple model configurations into a single model container, giving you fine-grained control over how each part of your schema is manipulated.

Important

SwiftData models with relationships must be part of the same store. For example, if a User model has a relationship with a Recipe model, SwiftData will not let you create a configuration for one that excludes the other – even if you exclude one, it will implicitly be added by SwiftData. To be clear, relationships cannot span multiple SwiftData stores.

For example, you might want to store Recipe objects permanently, but download Comment objects into a temporary store for faster access:

@main
struct RecipeBookApp: App {
    var container: ModelContainer

    init() {
        do {
            let config1 = ModelConfiguration(for: Recipe.self)
            let config2 = ModelConfiguration(for: Comment.self, isStoredInMemoryOnly: true)

            container = try ModelContainer(for: Recipe.self, Comment.self, configurations: config1, config2)
        } catch {
            fatalError("Failed to configure SwiftData container.")
        }
    }

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
        .modelContainer(container)
    }
}

Again, if those two model types were linked through a relationship, SwiftData would have no choice but to load both types in both configurations.