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PONSFetchResultController - one-many relationship
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copied!<p>i have four tables. This is my table structure</p> <p>Master >---->> Projects >---->> Tasks >----> Document</p> <p>I am using NSFetchResultController to fetch objects from Database. Tasks are loaded in the tableview based on number of tasks for the projects. (for now there is only one project)</p> <p>i can use following code to get the task objects</p> <pre><code>NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Tasks" inManagedObjectContext:context]; [fetchRequest setEntity:entity]; NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"taskId" ascending:NO]; [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sort]]; [fetchRequest setFetchBatchSize:20]; NSFetchedResultsController *theFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:context sectionNameKeyPath:nil cacheName:@"Root"]; self.fetchedResultsController = theFetchedResultsController; _fetchedResultsController.delegate = self; </code></pre> <p>which returns the number of Tasks and i can use like this.</p> <pre><code>id sectionInfo = [[_fetchedResultsController sections] objectAtIndex:section]; </code></pre> <p>But i need to use from top level objects like Master -- >> Projects -->> Tasks. How can i implement top level objects instead of using "Tasks" in FetchResultController.</p> <p>i.e,</p> <pre><code>NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Master" inManagedObjectContext:context]; [fetchRequest setEntity:entity]; </code></pre> <p>I don't have any id in master to sort. Master has one - many relationship with Projects. </p>

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