Re: Core Recipes question (Migration)
Re: Core Recipes question (Migration)
- Subject: Re: Core Recipes question (Migration)
- From: Ryan Britton <email@hidden>
- Date: Mon, 31 Jul 2006 10:11:23 -0700
The default model-loading code for the Core Data templates generates
a merged model from all of the models found in the app. Unless
you've changed this to load a specific model, this is likely the
problem you're running into.
On Jul 31, 2006, at 9:43 AM, Andrew Merenbach wrote:
Hi, all. I've a Core Data document-based app that needs document
migration support, and I've found the Core Recipes example
absolutely invaluable. I have all the parts, as far as I can tell,
fully in place. I made my own migration framework, linked it, ran
my program, and... nothing. I get the following error--
Can't merge models with two different entities named 'Record'
--where Record is the name of one of my entities. I have multiple
model files, one for each intended version of my documents; and
unticking the inclusion checkbox in Xcode for all of them (in my
framework) causes my program to run just fine.
I'm pretty sure that I understand this much: including two Core
Data model files with any identical entity names would pose a problem.
What I don't get is this: the Core Recipes Migration example also
has a framework (MigrationFramework) that includes multiple model
files, both of which share an identical entity name. How on earth
can I be able to run the "Migrator" target in the Migration
example, which includes the framework, and not get the same error?
I'm positive that I've set up my project in the same way.
Is there some build-setting checkbox that I'm missing? Some
inclusion or role setting? Something?
Many thanks, all,
Andrew
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