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PODrill-down application / Core Data+UITable View+Custom Cell
 

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    <p>i am currently working on a test project which has a tab bar, a drill down table list of Districts --> Schools --> school details.</p> <p>Data store is using core data/.mysqlite</p> <p>**Districts' view is a plain table list which list out districts<br> ***Schools' view is a table view with custom cell which display name,address and picture of schools in the selected district<br> ***Detail view is a sectioned table with more details of the selected school.</p> <p>I have managed to get the district table view setup and display correctly but I am stuck on pushing the 2nd view which is the School view. How could I pass data to the 2nd view or switch the Fetch Result entity? I have tried with different method but it is having error, probably it's because I am using the wrong method or missing something at didSelectRow</p> <p>Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '+entityForName: could not locate an NSManagedObjectModel for entity name 'School'</p> <p>I couldn't find out what the problem is. Would be great if anyone could give me some hints on that.</p> <blockquote> <blockquote> <p>DistrictListTableViewController -- FRO, MOC fetching "District"<br> NSEntityDescription *entity = [NSEntityDescription entityForName:@"District" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity];</p> </blockquote> </blockquote> <p>@class District;</p> <p>@interface DistrictListTableViewController : UITableViewController { @private NSFetchedResultsController *fetchedResultsController; NSManagedObjectContext *managedObjectContext; }</p> <p>@property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;<br> @property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;</p> <blockquote> <blockquote> <p>SchoolListTableViewController -- FRO, MOC fetching "School"<br> NSEntityDescription *entity = [NSEntityDescription entityForName:@"School" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity];</p> </blockquote> </blockquote> <p>@class School;</p> <p>@interface DistrictListTableViewController : UITableViewController { @private NSFetchedResultsController *fetchedResultsController; NSManagedObjectContext *managedObjectContext; }</p> <p>@property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;<br> @property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;</p> <blockquote> <blockquote> <p>Both DistrictListTableViewController &amp; SchoolListTableViewController .m files are pretty much the same except School View loads the SchoolTableViewCell file, I don't know if this is the right method.</p> </blockquote> <p>-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {<br> SchoolListTableViewController *schoolViewController = [[SchoolListTableViewController alloc] initWithStyle:UITableViewStylePlain];<br> [self.navigationController pushViewController:mallViewController animated:YES];<br> [schoolViewController release];<br> }</p> </blockquote> <p>I am pretty new to this, so please tell me where did I do wrong and what is the right method of passing the entity and data to the 2nd view and how.</p> <p>Thank you very much.</p> <p>thanks and this is my fetchedcontroller part</p> <blockquote> <p>> - (NSFetchedResultsController *)fetchedResultsController {</p> </blockquote> <pre><code>if (fetchedResultsController != nil) { return fetchedResultsController; } NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"District" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity]; NSSortDescriptor *locateDescriptor = [[NSSortDescriptor alloc] initWithKey:@"territory" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:locateDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"territory" cacheName:@"Root"]; self.fetchedResultsController = aFetchedResultsController; fetchedResultsController.delegate = self; [aFetchedResultsController release]; [fetchRequest release]; [locateDescriptor release]; [sortDescriptors release]; return fetchedResultsController; </code></pre> <p>} </p> <p>so, in the School controller, i would just switch "District" with "School" and sort description with the name of the school.</p>
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