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Re: Core Data Migration Error
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Re: Core Data Migration Error

  • Subject: Re: Core Data Migration Error
  • From: Jerry Krinock <email@hidden>
  • Date: Tue, 18 Jan 2011 11:20:47 -0800
On 2011 Jan 16, at 17:31, Michael Link wrote:

> This migration is using the default mapping model created in Xcode. The Event entity was changed to have an abstract parent entity, before it stood alone.

Migrating abstract entities can be problematic.  For example,

http://www.cocoabuilder.com/archive/cocoa/227970-migration-with-abstract-entities.html?q=Core+data+abstract+entity+migration+error#227970

> I tried creating an entity migration policy subclass but none of its methods are called. Anyone have any ideas what the problem might be?

Maybe you have not specified the migration policy in the Custom Policy: field of the relevant "Entity" form of the Mapping Model.

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References: 
 >Core Data Migration Error (From: Michael Link <email@hidden>)

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