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I want to use relationships in core-data on data that already has been imported.
In other words the data gets imported from a mysql import…
Then I want to use relationships in core-data to connect entities via my own pre-existing data .
Is this even possible????
You can, but in this case you must write your own functions for get data from your relationship, in Core Data. I’m think this very bad way to use Core Data. Much better is manually set all relationships, when you import data from sqlite DB.