iPhone | Core data migration for a new version built from scratch

Question

I am working on an App update and this version is completely built from scratch and has completely new coreData model schema. I need to write coreData

Answer 1

Without the old model schema, you cannot do a migration. Well, that's sort of logical.

You only perceivable option is to reverse engineer the old model schema and take it from there.

Then you construct your new schema by adding / deleting / changing entities, attributes and relationships.

If you can extract the data from the existing store, just write a custom export function and insert it into your brand new core data store.