Question

I have two entities called folder and file, Folder has one to many relationship with file entity. File entity has a property called completedStatus which is a BOOL. I need to check which all files have this completedStatus == TRUe IN a particular folder.file NSOrderedSet.

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For this I tried this way, by reading the docs, but it is not working

[NSPredicate predicateWithFormat:@"completedStatus = 1 IN %@", file.note]];

So Please help me out.

Regards
Ranjit

Answer 1

This should do what you want:

NSArray *files = ... // your array of File objects
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"completedStatus = 1"];
NSArray *completedFiles = [files filteredArrayUsingPredicate:predicate];

UPDATE: NSOrderedSet does not have methods to filter with predicates. But you can convert the ordered set folder.file to an array:

NSArray *files = [folder.file array];

and then continue as above.

Alternatively, you can make a fetch request on the File entity with the predicate

[NSPredicate predicateWithFormat:@"completedStatus = 1 && folder = %@", theFolder]

assuming that you have defined the inverse relationship folder from the File entity to the Folder entity.