Enabling core data lightweight migration in Swift 3

Question

According to the articles I have read the correct way to enable core data light weight migrations is by passing options to addPersistentStoreWithType:

Answer 1

In my case I make append to new description instead of replacement

let description = NSPersistentStoreDescription()
description.shouldInferMappingModelAutomatically = true
description.shouldMigrateStoreAutomatically = true
container.persistentStoreDescriptions.append(description)