cocoa iphone core-data predicate one-to-many fetchrequest

Question

I have a set of data where one of the attributes (Firmware) is a one-to-many relationship.

If I want to get any records where the firmware id is 1 I can create a predicate using

@"(ANY Firmware.FID==1)"

Then I have another set of conditions that will refine the set even more using

(TopLevel==YES) AND (Parent>0)

How can I combine them or set it up so that first it filters the firmware then it filters the second condition? Ultimately I want all of the records where Firmware.FID=1 and TopLevel==YES and Parent>0.

Thanks, Howie

Answer 1

You should be able to use this predicate:

[NSPredicate predicateWithFormat:@"TopLevel == %@ AND Parent > %@ AND ANY Firmware.FID == %@",[NSNumber numberWithBool:YES],[NSNumber numberWithInteger:0],[NSNumber numberWithInteger:1]];  

I moved the condition on "ANY Firmware.FID" last since it is the most complex and it can be avoided if one of the other conditions has already failed.