ios - NSPredicate that filters out subclass results -


i have 2 classes, company , mycompany. mycompany subclass of company, , company subclass of nsmanagedobject. trying write predicate nsfetchrequest return results of class company, filter out mycompany objects.

i have tried following (suggested here https://stackoverflow.com/a/8065935/472344):

nspredicate *predicate = [nspredicate predicatewithformat:@"class != %@",nsstringfromclass([mycompany class])];

but error:

'keypath class not found in entity <nssqlentity ckcompany id=1>'

i tried (suggested here https://stackoverflow.com/a/11693983/472344, know want not self iskindofclass, testing exact same command given in answer):

nspredicate *predicate = [nspredicate predicatewithformat:@"self iskindofclass: %@", [mycompany class];

and got following error:

'unknown/unsupported comparison predicate operator type'

how can write predicate achieve want? supporting ios 5 , above.

you can set

[fetchrequest setincludessubentities:no];

so fetch request returns objects of entity type of request, , not include subentities.

it (as far know) not possible refer objects class or entity name in predicate if predicate used in core data fetch request.


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