modelContainer(for:inMemory:isAutosaveEnabled:isUndoEnabled:onSetup:)

Declaration

@MainActor @preconcurrency func modelContainer(for modelTypes: [any PersistentModel.Type], inMemory: Bool = false, isAutosaveEnabled: Bool = true, isUndoEnabled: Bool = false, onSetup: @escaping (Result<ModelContainer, any Error>) -> Void = { _ in }) -> some View

Parameters

• modelTypes:

  The model types defining the schema used to create the model container.

• inMemory:

  Whether the container should store data only in memory.

• isAutosaveEnabled:

  true if autosave is enabled.

• isUndoEnabled:

  Use undoManager in the view’s environment to manage undo operations for the model container.

• onSetup:

  A callback that will be invoked when the creation of the container has has succeeded or failed.

Discussion

In this example, the RecipesList view sets a model container to use for all of its contents, configured to store instances of Recipe and Ingredient:

@Model class Recipe { ... }
@Model class Ingredient { ... }
...
RecipesList()
    .modelContainer(for: [Recipe.self, Ingredient.self])

The environment’s modelContext property will be assigned a new context associated with this container. All implicit model context operations in this view, such as Query properties, will use the environment’s context.

By default, the container stores its model data persistently on disk. To only store data in memory for the lifetime of the app’s process, pass true to the inMemory: parameter.

The container will only be created once. New values that are passed to the modelTypes and inMemory parameters after the view is first created will be ignored.