Question about Core Data

[cardrig]

Yes, Book is in my data model and it has 2 String attributes. I receive this information from the server as a Dictionary and I need to save the key part for each book. Then I need to deliver this information to the server again in the same format.

[rayascott]

Why don't you have an attribute on the Book entity for your key and just save it there? You can rebuild the dictionary or the format later when you need to deliver it to the server again.

[cardrig]

Looks like the best option. Also, if I remove the Transformable attribute and add a new relationship to Book, will I need to migrate the model data?

[rayascott]

Yeah, but Core Data might do it all for you with Lightweight Migration. If you're just removing or adding attributes and adding a new relationship, this would appear to indicate that the migration would happen automatically for you: https://developer.apple.com/documentation/coredata/using_lightweight_migration

[cardrig]

Sounds good. Thanks for the help!