StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
9242877
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2012-02-11T18:32:33.027
FavoriteCount
0
LastActivityDate
2012-02-12T09:23:05.487
LastEditDate
2012-02-12T09:23:05.487
LastEditorUserId
427083
OwnerUserId
608043
ParentId
9241875
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
If you didn't have any <strike>crush</strike> crash (and not only in this case), first I would replace the string: <pre><code>[managedObjectContext save: &error]; </code></pre> with something like: <pre><code>// Save the managed object context. NSError *error = nil; if (![self.managedObjectContext save:&error]) { NSLog(@"Failed to save object to managed object context: %@, %@", error, [error userInfo]); } </code></pre> Perhaps (and I think most likely), NSlog in this case will give you some info. In any case, man, saving is a quite dangerous operation and you shouldn't leave it without additional, at least small, check. Good luck! EDIT: Could you post how actually you make a fetching of the objects from the database. As far as I understand, you perform it here: <pre><code>tracks = [self fetchTracks]; </code></pre> But what is there? Also, I find a bit confusing the frase: <blockquote> Im using a NSFetchRequest not a fetchedResults controller. </blockquote> You create an object of NSFetchRequest in order to describe, what you want to retrieve (fetch) from the database. You do it properly, but I don't see in the code where you actually use this request then... For the purpose of retrieving NSFetchedResultsController is being used. You set it up smth. like: <pre><code>NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil]; aFetchedResultsController.delegate = self; self.fetchedResultsController = aFetchedResultsController; </code></pre> And then, to perform the actual fetch, you do smth. like: <pre><code>if (![self.fetchedResultsController performFetch:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); } </code></pre> (after this you can get all the objects from fetchedResultsController) OR, if you don't want to use controller, directly fetch to array: <pre><code>NSError *error = nil; NSArray *array = [managedObjectContext executeFetchRequest:request error:&error]; if (array == nil) { // Deal with error... } </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POiPhone - core data issue when adding
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USMundi
UserOwnerUserId
1. USmakaron
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.