Some data not staying in Core Data - objective-c

Question

I have a project where I'm consuming data from several web services and then storing them in separate entities in Core Data. To be precise there are 4 different entities. 3 of them are storing just fine. The 4th stores in Core Data and I can retrieve it later in other views but if I close the app and open it back up the InventoryImage Entity seems to be empty.
- (void)viewDidLoad {
[super viewDidLoad];
id delegate = [[UIApplication sharedApplication]delegate];
self.managedObjectContext = [delegate managedObjectContext];
_isConnected = TRUE;
[self checkOnlineConnection];
DealerModel *dealer = [[DealerModel alloc]init];
[dealer getDealerNumber];
_dealerNumber = dealer.dealerNumber;
//_dealerNumber = #"000310";
if (_isConnected == TRUE) {
[self downloadInventoryData:_dealerNumber];
[self downloadImages:_dealerNumber];
}
else{
[self loadInventory];
[self loadImages];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/* Table Data */
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_modelsArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
InventoryCell *cell = (InventoryCell *)[tableView dequeueReusableCellWithIdentifier:[_inventoryCell reuseIdentifier]];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:#"InventoryCell" owner:self options:nil];
cell = _inventoryCell;
_inventoryCell = nil;
}
InventoryHome *currentHome = [_modelsArray objectAtIndex:indexPath.row];
NSNumber *imageCount = [self loadImagesBySerialNumber:currentHome.serialNumber];
cell.lblModelDescription.text = currentHome.homeDesc;
cell.lblSerialNumber.text = currentHome.serialNumber;
cell.lblImageCount.text = [NSString stringWithFormat:#"Images: %#", imageCount];
return cell;
}
/* End Table Data */
/* Start Downloads */
#pragma mark - Inventory and Image Data
- (void)downloadInventoryData:(NSString *)dealerNumber
{
[self loadInventory];
if (_isConnected == 1 && [_modelsArray count] > 0) {
[self clearModelEntity:#"InventoryHome"];
}
NSString *urlString = [NSString stringWithFormat:#"%#%#", webServiceInventoryListURL, dealerNumber];
NSURL *invURL = [NSURL URLWithString:urlString];
NSData *data = [NSData dataWithContentsOfURL:invURL];
NSLog(#"Inventory Web Service URL: %#", invURL);
// Sticks all of the jSON data inside of a dictionary
_jSON = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
// Creates a dictionary that goes inside the first data object eg. {data:[
_dataDictionary = [_jSON objectForKey:#"data"];
// Check for other dictionaries inside of the dataDictionary
for (NSDictionary *modelDictionary in _dataDictionary) {
InventoryHome *home = [NSEntityDescription insertNewObjectForEntityForName:#"InventoryHome" inManagedObjectContext:[self managedObjectContext]];
NSString *trimmedSerialNumber = [NSString stringWithFormat:#"%#",[NSLocalizedString([modelDictionary objectForKey:#"serialnumber"], nil) stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
home.homeDesc = NSLocalizedString([modelDictionary objectForKey:#"description"], nil);
home.serialNumber = trimmedSerialNumber;
home.brandDesc = NSLocalizedString([modelDictionary objectForKey:#"branddescription"], nil);
home.beds = [NSNumber numberWithInt:[NSLocalizedString([modelDictionary objectForKey:#"numberofbedrooms"], nil) intValue]];
home.baths = [NSNumber numberWithInt:[NSLocalizedString([modelDictionary objectForKey:#"numberofbathrooms"], nil) intValue]];
home.sqFt = [NSNumber numberWithInt:[NSLocalizedString([modelDictionary objectForKey:#"squarefeet"], nil) intValue]];
home.length = [NSNumber numberWithInt:[NSLocalizedString([modelDictionary objectForKey:#"length"], nil) intValue]];
home.width = [NSNumber numberWithInt:[NSLocalizedString([modelDictionary objectForKey:#"width"], nil) intValue]];
}
[self loadInventory];
}
- (void)downloadImages:(NSString *)dealerNumber
{
[self loadImages];
if (_isConnected == 1 && [_imagesArray count] > 0) {
[self clearModelEntity:#"InventoryImage"];
}
NSString *stringImageURL = [NSString stringWithFormat:#"%#%#",inventoryImageURL, dealerNumber];
NSURL *url = [NSURL URLWithString:stringImageURL];
NSData *imageData = [NSData dataWithContentsOfURL:url];
_jSON = [NSJSONSerialization JSONObjectWithData:imageData options:kNilOptions error:nil];
_dataDictionary = [_jSON objectForKey:#"data"];
for (NSDictionary *imageDictionary in _dataDictionary) {
InventoryImage *image = [NSEntityDescription insertNewObjectForEntityForName:#"InventoryImage" inManagedObjectContext:[self managedObjectContext]];
NSString *trimmedSerialNumber = [NSString stringWithFormat:#"%#",[NSLocalizedString([imageDictionary objectForKey:#"serialnumber"], nil) stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
image.assetID = NSLocalizedString([imageDictionary objectForKey:#"aid"], nil);
image.sourceURL = NSLocalizedString([imageDictionary objectForKey:#"imagereference"], nil);
image.serialNumber = trimmedSerialNumber;
image.group = NSLocalizedString([imageDictionary objectForKey:#"imagegroup"], nil);
image.imageTagId = [NSString stringWithFormat:#"%#", [imageDictionary objectForKey:#"searchtagid"]];
image.imagesId = [NSString stringWithFormat:#"%#", [imageDictionary objectForKey:#"imagesid"]];
image.imageCaption = NSLocalizedString([imageDictionary objectForKey:#"imagecaption"], nil);
image.imageSource = NSLocalizedString([imageDictionary objectForKey:#"imagesource"], nil);
image.inventoryPackageID = NSLocalizedString([imageDictionary objectForKey:#"inventorypackageid"], nil);
}
}
/* End Downloads */
/* Load Inventory and Image From Core Data */
- (void)loadInventory
{
_fetchRequest = [[NSFetchRequest alloc]init];
_entity = [NSEntityDescription entityForName:#"InventoryHome" inManagedObjectContext:[self managedObjectContext]];
_sort = [NSSortDescriptor sortDescriptorWithKey:#"homeDesc" ascending:YES];
_sortDescriptors = [[NSArray alloc]initWithObjects:_sort, nil];
[_fetchRequest setSortDescriptors:_sortDescriptors];
[_fetchRequest setEntity:_entity];
NSError *error = nil;
_modelsArray = [[self managedObjectContext] executeFetchRequest:_fetchRequest error:&error];
if (![[self managedObjectContext]save:&error]) {
NSLog(#"An error has occurred: %#", error);
}
[self.inventoryListTable reloadData];
}
- (NSNumber *)loadImagesBySerialNumber: (NSString *)serialNumber
{
_imagesFetchRequest = [[NSFetchRequest alloc]init];
_imagesEntity = [NSEntityDescription entityForName:#"InventoryImage" inManagedObjectContext:[self managedObjectContext]];
_imagesPredicate = [NSPredicate predicateWithFormat:#"serialNumber = %# && group <> 'm-FLP' && imageSource <> 'MDL'", serialNumber];
[_imagesFetchRequest setEntity:_imagesEntity];
[_imagesFetchRequest setPredicate:_imagesPredicate];
NSError *error = nil;
_imagesArray = [[self managedObjectContext] executeFetchRequest:_imagesFetchRequest error:&error];
NSNumber *imageCount = [NSNumber numberWithInteger:[_imagesArray count]];
return imageCount;
}
- (void)loadImages
{
_imagesFetchRequest = [[NSFetchRequest alloc]init];
_imagesEntity = [NSEntityDescription entityForName:#"InventoryImage" inManagedObjectContext:[self managedObjectContext]];
[_imagesFetchRequest setEntity:_imagesEntity];
NSError *error = nil;
_imagesArray = [[self managedObjectContext] executeFetchRequest:_imagesFetchRequest error:&error];
}
/* End Load Inventory and Image From Core Data */
- (void)clearModelEntity:(NSString *)entity
{
_fetchRequest = [[NSFetchRequest alloc]init];
_entity = [NSEntityDescription entityForName:entity inManagedObjectContext:[self managedObjectContext]];
[_fetchRequest setEntity:_entity];
NSError *error = nil;
_modelsArray = [[self managedObjectContext] executeFetchRequest:_fetchRequest error:&error];
for (NSManagedObject *object in _modelsArray) {
[[self managedObjectContext] deleteObject:object];
}
NSError *saveError = nil;
if (![[self managedObjectContext] save:&saveError]) {
NSLog(#"An error has occurred: %#", saveError);
}
}
- (void)clearImageEntity:(NSString *)entity
{
_fetchRequest = [[NSFetchRequest alloc]init];
_entity = [NSEntityDescription entityForName:entity inManagedObjectContext:[self managedObjectContext]];
[_fetchRequest setEntity:_entity];
NSError *error = nil;
_imagesArray = [[self managedObjectContext] executeFetchRequest:_fetchRequest error:&error];
for (NSManagedObject *object in _imagesArray) {
[[self managedObjectContext] deleteObject:object];
}
NSError *saveError = nil;
if (![[self managedObjectContext] save:&saveError]) {
NSLog(#"An error has occurred: %#", saveError);
}
}

Answer 1

Don't forget to call [save:conetext]. if you close without saving you will lost your data.