Unable to update position in core data - ios

Question

I need to update position in core data base. When I add object or remove it from that base everything works fine. Problem occurs when I want to update object in that base. The problem is that program throws me:
Thread 1: EXC_BAD_ACCES(code = 2, adres = 0x38).
It's weird because it throws this error but updtades object at core data. I'm using simulator on Xcode 5. I've tried to comment line by line back in code but it hasn't helped anymore. Taking look at the address of the error and the screen shot there is no address compatible with each other. What is wrong?
Code is this:
[self insertPositionRightAfterChangeValues:name rating:[changedRate stringValue] urlMain:[newInsert urlMain] contentUrl:[newInsert contentUrl] coverUrl:[newInsert coverUrl] date:[newInsert date] type:[newInsert type] int:integer];
And the rest of this method:
-(void)insertPositionRightAfterChangeValues:(NSString *)name rating:(NSString *)rating urlMain:(NSString *)urlMain contentUrl:(NSString *)contentUrl coverUrl:(NSString *)coverUrl date:(NSString *)date type:(NSString *)type int:(int)position
{
int motherPosision = position;
//insert new one
NSManagedObjectContext *context2 = [self managedObjectContext];
Kwejki * newEntry = [NSEntityDescription insertNewObjectForEntityForName:#"Kwejki" inManagedObjectContext:context2];
newEntry.name = [[NSString alloc] initWithString: name];
newEntry.rating = [[NSString alloc] initWithString: rating];
newEntry.urlMain = [[NSString alloc] initWithString: urlMain];
newEntry.contentUrl = [[NSString alloc] initWithString: contentUrl];
newEntry.coverUrl = [[NSString alloc] initWithString: coverUrl];
newEntry.date = [[NSString alloc] initWithString: date];
newEntry.type = [[NSString alloc] initWithString: type];
NSLog(#"%#", newEntry.name);
NSLog(#"%#", newEntry.rating);
NSLog(#"%#", newEntry.urlMain);
NSLog(#"%#", newEntry.contentUrl);
NSLog(#"%#", newEntry.coverUrl);
NSLog(#"%#", newEntry.date);
NSLog(#"%#", newEntry.type);
NSError *error2;
if (![context2 save:&error2]) {
NSLog(#"Whoops, couldn't save: %#", [error2 localizedDescription]);
}
else{
NSLog(#"SAVED!!!");
}
}
And the screenshot with this error:
UPDATE:
When I comment line where I invoke method to insert new object I get following error: CoreData: error: Failed to call designated initializer on NSManagedObject class 'Kwejki'
UPDATE 2:
#interface Kwejki : NSManagedObject<NSCopying>
#property (nonatomic, strong) NSString * type;
#property (nonatomic, strong) NSString * contentUrl;
#property (nonatomic, strong) NSString * coverUrl;
#property (nonatomic, strong) NSString * rating;
#property (nonatomic, strong) NSString * urlMain;
#property (nonatomic, strong) NSString * date;
#property (nonatomic, strong) NSString * name;
#end
#implementation Kwejki
#synthesize name;
#synthesize date;
#synthesize urlMain;
#synthesize rating;
#synthesize coverUrl;
#synthesize contentUrl;
#synthesize type;
-(Kwejki *)copyWithZone:(NSZone *)zone
{
Kwejki *copyModel = [[Kwejki allocWithZone:zone] init];
if(copyModel)
{
copyModel.name = [self name];
copyModel.date = [self date];
copyModel.urlMain = [self urlMain];
copyModel.rating = [self rating];
copyModel.coverUrl = [self coverUrl];
copyModel.contentUrl = [self contentUrl];
copyModel.type = [self type];
}
return copyModel;
}
#end
-(void)addNewPosition:(ScrollViewViewController *)ScrollController recentlyDownloadedItem:(KwejkModel *)modelTmp
{
if(modelTmp == nil)
{
NSLog(#"YES NULL");
}
else
{
NSLog(#"Not null");
}
Kwejki * newEntry = [NSEntityDescription insertNewObjectForEntityForName:#"Kwejki" inManagedObjectContext:self.managedObjectContext];
NSLog(#"%#", [modelTmp getNameOfItem]);
newEntry.name = [[NSString alloc] initWithString:[modelTmp getNameOfItem]];
newEntry.rating = [modelTmp getRateOfPosition];
newEntry.urlMain = [modelTmp getUrlAdress];
newEntry.contentUrl = [modelTmp getContentUrl];
newEntry.coverUrl = [modelTmp getCoverImage];
newEntry.date = [modelTmp getDateOfItem];
if([modelTmp getType] == photo)
{
newEntry.type = #"0";
}
else if([modelTmp getType] == gif)
{
newEntry.type = #"1";
}
else if ([modelTmp getType] == video)
{
newEntry.type = #"2";
}
NSLog(#"%#", newEntry.name);
NSLog(#"%#", newEntry.rating);
NSLog(#"%#", newEntry.urlMain);
NSLog(#"%#", newEntry.contentUrl);
NSLog(#"%#", newEntry.coverUrl);
NSLog(#"%#", newEntry.date);
NSLog(#"%#", newEntry.type);
NSError *error;
if (![self.managedObjectContext save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
else{
NSLog(#"UDALO SIE!!!");
}
[modelArray insertObject:newEntry atIndex:0];
[self.tableView reloadData];
}
I've tried to overcome this problem just adding new object again as update but it also doesn't helped. How I add new object: I tap long on position, new window opens and there I add new values, invoke from that view method from Main ViewController, and here it crashes. When I add normally object as described above but in separate window everything works. I really don't know what is wrong.

Answer 1

When I see this error it normally mean that I did not setup my NSManageObject correctly.
Things to check:
Add a break point in your insertPositionRightAfterChangeValues method and step through to find where the exception is thrown. (My guess is when your creating your Kwejki object.)
That Kwejki is a subclass of NSManageObject.
That Kwejki entity and class name are correct. (Could you show your .xcdatamodeId entity properties for Kwejki?)
If everything is correct, then for an insanity check I would create the Kwejki object the long way.
NSEntityDescription *entity = [NSEntityDescription entityForName:NSStringFromClass([Kwejki class]) inManagedObjectContext:context2];
Kwejki* newEntry = [[Kwejki alloc] initWithEntity:entity insertIntoManagedObjectContext:context2];
Then you can see if the entity is a problem or your Kwejki is.
P.S. As a helpful suggestion instead of typing in the entity name.
Kwejki * newEntry = [NSEntityDescription insertNewObjectForEntityForName:#"Kwejki" inManagedObjectContext:context2];
I would do something like this.
Kwejki * newEntry = [NSEntityDescription entityForName:NSStringFromClass([Kwejki class]) inManagedObjectContext:context2];
This give you a compiler check for entity name.