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core-dataxcode4osx-snow-leopard

Core Data To-many relationship with Mac OSX 10.6 is not supported?

i'm try to study Core Data programming to develop Mac OSX application... I've Snow Leopard (10.6.8) and in XCode 4 when i try to check "To-Many Relationship" in my relationship properties i've got this error:

error: Unsupported Feature: to-many relationship Category.snipplet option requires Mac OS X 10.7 or later

So it's possible that 10.6 SDK doesn't support to-many relationship? Obviously i want to develop an application target for 10.6 and later.

My core data schema is very simple, i have two entity with a to-many ralationship...

Thanks to all.

Solution

  • I think you try to use an ordered to-many relationship. But they are only supported on Mac OS 10.7++ and iOS 5++.

    Remove the checkmark from ordered in the core data Data Model Inspector panel.
    You then have to order the relationships yourself (e.g. by adding an order attribute to your entity).