I am having an issue with Core Data... here is my situation:
I have a Restaurant and that restaurant has a category which is a to-many relationship and the category also has a to-many relationship back to the restaurants
for example:
McDonald's has a category of: (category) Fast Food, (category) Local
Category (Fast Food)
Type: (NSString) Fast Food)
Restaurant: (Restaurant) McDonald's, (Restaurant) Burger King ... etc
So this works. I can have it show this data, add to it, delete etc. The issue I am having: I cannot get my results to show up until I actually stop and restart my applications. I cannot seem to 'refresh' my managedObject with the new data.
For Example: Currently McDonald's has a Category of Fast Good and Local, but in my application I want the user to be able to add another category. So the user goes in, sees a list of categories and then selects the category "Lunch". This is the code I use to do this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(@"EditCatagoriesTableViewController - didSelectRowAtIndexPath section:%d row:%d ",indexPath.section,indexPath.row);
if ([tableView cellForRowAtIndexPath:indexPath].accessoryType != UITableViewCellAccessoryCheckmark){
[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
[restaurant addCategoriesObject:(Category*)[categoryArray objectAtIndex:indexPath.row]];
}else{
if ( [currentCategories containsObject:[categoryArray objectAtIndex:indexPath.row]] )
[restaurant removeCategoriesObject:(Category*)[categoryArray objectAtIndex:indexPath.row]];
}else{
NSLog(@"Object Not Present");
}
[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryNone;
}
NSError *error = nil;
if (![ [restaurant managedObjectContext] save:&error]) {
// Handle error
NSLog(@"restaurant - Unresolved error %@, %@", error, [error userInfo]);
exit(-1); // Fail
}
if (![ [[categoryArray objectAtIndex:indexPath.row] managedObjectContext] save:&error]) {
// Handle error
NSLog(@"restaurant - Unresolved error %@, %@", error, [error userInfo]);
exit(-1); // Fail
}
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
This works only in the effect if I shut down my app and reload it. But If I use my restaurant object (which is a managedObject for McDonald's) it does not show up until that application shut down, I have opened a break point and in gdb have done this:
(gdb) po restaurant
<Restaurant: 0x114cf80> (entity: Restaurant; id: 0x114b660 <x-coredata://9477D580-A02E-482C-AF7B-F01D6E9AC332/Restaurant/p2> ; data: {
categories = (
0x131f560 <x-coredata://9477D580-A02E-482C-AF7B-F01D6E9AC332/Category/p7>
);
city = "Cedar Park";
deals = (
);
foodTypes = (
);
name = "Mc Donalds";
phoneNumber = "(512)336-0323";
state = TX;
"street_1" = "1103 N Bell Blvd";
"street_2" = "";
timeStamp = nil;
webAddress = "http://www.mcdonalds.com/";
zip = 78613;
})
As you can see it shows the Categories as the one (in this case only has one category linked to this restaurant)
<Category: 0x132d9c0> (entity: Category; id: 0x132cf80 <x-coredata://9477D580-A02E-482C-AF7B-F01D6E9AC332/Category/p4> ; data: {
Restaurant = (
0x114b660 <x-coredata://9477D580-A02E-482C-AF7B-F01D6E9AC332/Restaurant/p2>
);
name = "Weekday Lunch Spot";
})
Yet my Category (lunch spot) shows it has a pointer back to the Restaurant Mc Donald's
So How do I go about refreshing the restaurant to that I can see the new object?