iphone - NSFetchRequest does not read updated rows -

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the data gets downloaded , written in core data in background thread (child/parent context) using nsfetchrequest first time reading ok. after refresh, pull data core data , update new values. again reading data nsfetchrequest in main thread/main context. still returns old values. have checked core data table , has new values in it. , can see updated data after killing , restarting app.

what doing wrong?

ps: sorry cant post code. huge project. other parts of project based on core data works perfectly. part getting on nerve. :-(

the problem fetchresult controller retrieving objects on main thread , had group on more 1 attribute , calculate date current time zone. had allthis done in background thread. once again learned core data objects not thread safe!


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