Re: object's class could not be determined
Re: object's class could not be determined
- Subject: Re: object's class could not be determined
- From: Lachlan Deck <email@hidden>
- Date: Tue, 08 May 2012 14:28:51 +1000
On 08/05/2012, at 12:06 PM, Chuck Hill wrote:
> On 2012-05-06, at 1:17 PM, Larry Mills-Gahl wrote:
>
>> I am having a model problem with a cross-model, cross-database (and apparently crossed-streams) situation.
>>
>> A "Referral" object is a subclass of AbstractEncounter (subclassed in separate tables for each entity).
>> The "referrer" relationship is only part of the Referral object, not any superclass.
>> The "referrer" relationship is to an object that is a subclass of AppUser (vertical inheritance with qualifer of persontype = some int flag)
>
> VI is seldom used, so you may be hitting a VI specific bug.
I seem to recall that scenario being a problem which (IIRC) is in the database context and EOEntity (when determining relationships/operations) and related classes. Some private methods need overriding.
I overrode the DB context to work around it (partially) but may have also done so in the entity itself -- to fetch from a particular direction.
Are you using Wonder? WO5.4.x has a bug in EOEntity which I fixed in Wonder for inheritance.
// IIRC the problem is here in EODatabaseContext
private void createAdaptorOperationsForDatabaseOperationAttributes( EODatabaseOperation dbOp, NSArray atts )
{
EOEntity entity = dbOp.entity();
switch ( dbOp.databaseOperator() )
{
<...>
case 2: // bug
{
// this will create locking operation
// if partial entity has no changed values!
if ( changedValuesCount == 0 || blobsCount > 0)
{
<...>
}
}
}
---------------
Here's the comment I've got in my code from 2007.
// FIXME: (lachlan) we do not want a locking operation when changedValuesCount == 0.
// I don't even know if we want one for blobsCount > 0.
// Bug report submitted to radar.apple.com (id 5632577)
//if ( changedValuesCount == 0 || blobsCount > 0 )
if ( blobsCount > 0 )
Run away if you can :-)
Lachlan Deck
email@hidden
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