On May 22, 2009, at 11:40 AM, Rick Mann wrote:
On May 22, 2009, at 09:58:15, Adam Swift wrote:
On May 22, 2009, at 1:45 AM, Rick Mann wrote:
I'm working on a Framework with a Core Data model. When I first
built the test app, I couldn't get the Framework to work right,
and so I had all the source files (and .xcdatamodel) included in
the test app directly. That worked fine.
I've figured out the Framework issues, and moved the model &
source code files back to it. The code runs, but I get this error:
5/22/09 01:38:07 FullExample[37912] +entityForName: could not
locate an entity named 'OSMNode' in this model.
I put the files all back in the test app project just to double
check, and that works. Do I need to do something special in this
situation? The test app code instantiates an object in the
Framework and calls a method (this works), but otherwise doesn't
directly access the model.
It sounds like you aren't adjusting the code that loads the managed
object model when you move the resource into your framework.
Thanks for the response Adam. Could you be more specific? What
adjustment needs to be made?
Sure. Since the data model is now part of the framework project, when
you build that framework the model should get built along with the
other source files and it will be packaged up into your frameworks
Resources directory:
${BUILDDIR}/MyFramework.framework/Resources/MyModel.mom
Since it sounds like you've already got some code that's successfully
loading the model when it's included in your application project, you
might want to look at the initialization of the
NSPersistentStoreCoordinator to see from where the model is retrieved
(search for initWithManagedObjectModel:). You'll probably want to
have a method that takes care of locating, loading and returning the
model, if that code lives in the framework, you can use the class to
lookup the framework bundle (otherwise you'll want to look up the
framework bundle by it's identifier [NSBundle
bundleWithIdentifier:@"com.mycompany.MyFramework"])
- (NSManagedObjectModel *)managedObjectModel {
if (managedObjectModel) return managedObjectModel;
NSBundle *frameworkBundle = [NSBundle bundleForClass:[self class]];
NSURL *modelPath = [NSURL fileURLWithPath:[frameworkBundle
pathForResource:@"MyModel" ofType:@"mom"]];
managedObjectModel = [[NSManagedObjectModel alloc]
initWithContentsOfURL:modelPath];
return managedObjectModel;
}
- adam
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