Core Data Migration: How to delete the Core Data stack?

Question

My plan is to delete the old Core Data stack (the NSManagedObjectModel .momd file & the NSPersistentStore .sqlite file) b

Answer 1

If you create a blank Core Data application you find the necessary code in Apples comments in the Application Delegate:

If you encounter schema incompatibility errors during development, you can reduce their frequency by:

• Simply deleting the existing store: [[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil]

• Performing automatic lightweight migration by passing the following dictionary as the options parameter:@{NSMigratePersistentStoresAutomaticallyOption:@YES, NSInferMappingModelAutomaticallyOption:@YES} Lightweight migration will only work for a limited set of schema changes; consult "Core Data Model Versioning and Data Migration Programming Guide" for details.