Use heavyweight (manual) migration in rare cases when changes to the data model exceed the capabilities of lightweight migration.
Framework
- Core Data
Use heavyweight (manual) migration in rare cases when changes to the data model exceed the capabilities of lightweight migration.
Framework
NSMigration Manager
A migration manager instance that performs a migration of data from one persistent store to another using a given mapping model.
NSMapping Model
A model instance that specifies how to map a model from a source to a destination managed object model.
NSEntity Mapping
A mapping instance that specifies how to map an entity from a source to a destination managed object model.
NSEntity Migration Policy
A policy instance that customizes the migration process for an entity mapping.
NSEntity Mapping Type
The types for mapping an entity between a source model and a destination model.
NSProperty Mapping
A mapping instance that specifies in a model how to map from a property in a source entity to a property in a destination entity.
Request lightweight (automatic) migration to update your data model to match changes in your app.