Hi Jerry, thanks for the reply. I managed to get the subclass methods to fire
eventually, I have no idea what I was doing wrong though. I trashed all my
files and started again and for some reason that fixed it.
But I now have another problem, core data migrates fine without the
NSEntityMigrationPolicy subclass, however as as soon as I add it it's name in
the "custom Policy" field I get the following error, which is perplexing me...
Unresolved error Error Domain=NSCocoaErrorDomain Code=134110 UserInfo=0x1ea4b0
"Operation could not be completed. (Cocoa error 134110.)", {
NSUnderlyingError = Error Domain=NSCocoaErrorDomain Code=256
UserInfo=0x1ec540 "Operation could not be completed. (Cocoa error 256.)";
reason = "Failed to save new store after first pass of migration.";
My first thought was that maybe I had to call 'super' in 'endEntityMapping',
but I tried it and it made no difference...
- (BOOL)endEntityMapping:(NSEntityMapping *)mapping manager:(NSMigrationManager
*)manager error:(NSError **)error
{
NSLog(@"endEntityMapping");
[super endEntityMapping: mapping manager: manager error: error];
return YES;
}
On 8 Sep 2010, at 01:57, Jerry Krinock wrote:
>
> On 2010 Sep 06, at 05:31, Ben wrote:
>
>> my NSEntityMigrationPolicy subclass methods are not being called so that I
>> can run further migration code.
>>
>> @implementation TestMigrationPolicy
>>
>> - (BOOL)beginEntityMapping:(NSEntityMapping *)mapping
>> manager:(NSMigrationManager *)manager
>> error:(NSError * *)error
>
> Just made a custom migration yesterday, doing what you said you did, and it
> worked fine. However the only method I've ever implemented in my
> NSEntityMigrationPolicy subclasses is
> createDestinationInstancesForSourceInstance:entityMapping:manager:error:.
> I've never had any trouble with it. That method should be called once for
> each object in your store.
>
> Or maybe stick an NSLog() in +initialize.
>
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