Versioning and Migrating Data

  • Michael Privat
  • Robert Warner


As you develop Core Data-based applications, you usually don’t get your data model exactly right the first time. You start by creating a data model that seems to meet your application’s data needs, but as you progress through the development of the application, you’ll often find that your data model needs to change to serve your growing vision of what your application should do. During this stage of your application’s life, changing your data model to match your new understanding of the application’s data poses little cost: your application will no longer launch, crashing on startup with the message:

The model used to open the store is incompatible with the one used to create the store.


Mapping Model Core Data Destination Model Migrate Data Entity Mapping 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Michael Privat and Robert Warner 2011

Authors and Affiliations

  • Michael Privat
  • Robert Warner

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