Move a Core Data entity and its data into new Core Data model file through Migration

Question

Is it possible to move a Core Data entity Car and its data in Model1 into a new Core Data model Model2 using migration? Model2 will also have a new CarOwner entity + other new relationships (so model file is different than Model1). Is this possible using lightweight migration or do I have to use custom migration? I'm using Magical Record to setup my Core Data Stack.

I have been using lightweight migration for years with success. So I don't have any custom migration mechanism in place. I want to ask first before I implement a new system so I can incorporate CD custom migration into my existing MagicalRecord Core Data stack.

EDIT: updated question to clarify that Model1 and Model2 have differences.

Answer 1

With the same xcdatamodel file and different versions you can use a Mapping Model file, but being different mom files i guess those are different stacks and migration will not work.

Answer 2

Model migration is only relevant if the model has changed-- meaning, if the entities contained in the data model don't match the entities saved in the persistent store file. Migration doesn't depend on what model file you use, it depends on the entity hashes contained in that model.

Meaning: If your new model file has exactly the same entities as the persistent store file has, you don't actually need to migrate anything. Just start using the new model file. However keep in mind that if you ditch the old model file and all of its old versions, you won't be able to migrate from older versions of that model any more.