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PONSPredicate multiple ANY query with CoreData
 

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    <p>I'm trying to find all instances of an object that contain a reference to a combination of separate objects in my object graph.</p> <pre><code>recommendation </code></pre> <p><em>may</em> contain one or more of the following three objects:</p> <pre><code>damageType areaDamaged validVehicles </code></pre> <p>This structure is built from an import of an existing system's file format and I am unable to restructure the object graph.</p> <p>I'm using an <code>NSPredicate</code> to find all <code>recommendation</code> objects that have a <code>damageType</code> matching a selected damage as follows:</p> <pre><code>NSFetchRequest *fetchRequestDamages = [NSFetchRequest fetchRequestWithEntityName:NSStringFromClass([Recommendation class])]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY damageType == %@", _currentRecordedDamage.damageType]; </code></pre> <p>But want the filter to return all <code>Recommendations</code> that have matches for a specific <code>damageType</code>, <code>areaDamaged</code> and <code>validVehicle</code></p> <p>I've tried </p> <pre><code>NSMutableArray *predicates = [[NSMutableArray alloc] initWithCapacity:2]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY damageType == %@", _currentRecordedDamage.damageType]; [predicates addObject:predicate]; NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"ANY areaDamaged == %@", _currentAreaDamaged]; [predicates addObject:predicate2]; NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"ANY validVehicles == %@", _currentVehicle]; [predicates addObject:predicate3]; fetchRequestDamages.predicate = [NSCompoundPredicate andPredicateWithSubpredicates:predicates]; fetchRequestDamages.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES]]; self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequestDamages managedObjectContext:[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext sectionNameKeyPath:nil cacheName:nil]; self.fetchedResultsController.delegate = self; NSError *error; [self.fetchedResultsController performFetch:&amp;error]; int resultsFound = self.fetchedResultsController.fetchedObjects.count; </code></pre> <p>but it seems this returns the set of all objects satisfying any of the predicates - I'd like the set of objects that match all three.</p> <p>I'm looking into using <code>SUBQUERY</code> but can't quite make sense of how to create this query?</p>
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    1. USdavbryn
    1. USdavbryn
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    1. COWhat's your code for executing the fetch request?
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      1. USDavid Snabel-Caunt
    2. COUpdated the code
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      1. USdavbryn
    3. CO@davbryn: So you do already what I suggested below. - Perhaps you can show an example of what you get currently and what you expect.
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      1. USMartin R
 

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