Re: Does addition of new entity to data model require migration?
Re: Does addition of new entity to data model require migration?
- Subject: Re: Does addition of new entity to data model require migration?
- From: mmalc crawford <email@hidden>
- Date: Wed, 20 Sep 2006 13:42:10 -0700
On Sep 20, 2006, at 1:32 PM, Philip Dow wrote:
I'm wondering if I will need to migrate my data set if I add a new
class of entity to the model in a later version.
"Core Data stores are conceptually bound to the managed object model
used to create them: since a model describes the structure of the
data, changing a model will render it incompatible with (and so unable
to open) the stores it previously created. If you change your schema,
you therefore need to migrate the data in existing stores to new
version."
<http://developer.apple.com/documentation/Cocoa/Conceptual/CoreData/Articles/cdVersioning.html#//apple_ref/doc/uid/TP40002989
>
mmalc
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