I am using RestKit 0.2 with CoredData in my project but I am not able find sqlite database file in my project. Normally (Without Restkit) Sqlite database is located at
~/Library/Application Support/iPhone Simulator/[SDK version]/Applications/[App GUID]/Documents
But I cannot find SQLITE database path of my project at this path.
I followed the example of RKGist example and using that I initialized my RKObjectManager. I am using code below to set up my RKObjectManager
NSURL *modelURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"MyApp" ofType:#"momd"]];
// NOTE: Due to an iOS 5 bug, the managed object model returned is immutable.
NSManagedObjectModel *managedObjectModel = [[[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL] mutableCopy];
RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel];
// Initialize the Core Data stack
[managedObjectStore createPersistentStoreCoordinator];
NSError* error = nil;
NSPersistentStore __unused *persistentStore = [managedObjectStore addInMemoryPersistentStore:&error];
NSAssert(persistentStore, #"Failed to add persistent store: %#", error);
[managedObjectStore createManagedObjectContexts];
// Set the default store shared instance
[RKManagedObjectStore setDefaultStore:managedObjectStore];
// Configure the object manager
RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:#"http://69.164.209.214"]];
objectManager.managedObjectStore = managedObjectStore;
[RKObjectManager setSharedManager:objectManager];
I am able to properly map JSON data from the server to my NSManagedObject entities.
I am not sure whether my data is stored in database or not as I cannot find my SQLITE database file of my project.
Thanx,
Regards,
tek3
Related
I am currently trying to save video files to iCloud. I am using Core Data to save filename strings (filename.MOV) for each video, to then retrieve them from the ubiquity container. It all works locally (files save, and can be accessed from their URLs), but I am struggling to obtain the videos over iCloud. The Core Data syncs, so I have access to the file names, but when I try to obtain the video from the URL, I am unable to.
This is how I save the video after obtaining its url (videoURL below) from UIImagePicker, and creating a unique string from the current date:
NSString *videoFileName = [stringFromDate stringByAppendingPathExtension:#"MOV"];
NSURL *ubiquityContainer = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];
NSURL *saveToURL = [ubiquityContainer URLByAppendingPathComponent:videoFileName];
BOOL ok;
ok = [[NSFileManager defaultManager] setUbiquitous:YES itemAtURL:videoURL destinationURL:saveToURL error:nil];
if (!ok) NSLog(#"error saving");
I then have a Core Data table view to list all of the videos. Here I observe changes in the Core Data to sync with iCloud and reload (this all still works fine):
- (void)viewDidLoad {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(reloadFetchedResults:)
name:#"SomethingChanged"
object:[[UIApplication sharedApplication] delegate]];
}
- (void)reloadFetchedResults:(NSNotification*)note {
[self performFetch];
}
At this point, I want the ubiquity container to update, so that when I choose a video, and segue to a view controller to watch it, the video file can be found. (self.video is my Core Data video entity) (asset is is the video asset, which I can play back)
NSURL *ubiquityContainer = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];
ubiquityContainer = [ubiquityContainer URLByAppendingPathComponent:self.video.url];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:ubiquityContainer options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:AVURLAssetPreferPreciseDurationAndTimingKey]];
AVAssetTrack *videoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
This is where I run in to trouble. On the device where I took the video it works, but on another device, no file is found (objectAtIndex:0 is beyond bounds).
This is the metadata query I call at view did load:
NSMetadataQuery * query = [[NSMetadataQuery alloc] init];
NSString * filePattern = [NSString stringWithFormat:#"%#", self.video.url];
[query setPredicate:[NSPredicate predicateWithFormat:#"%K LIKE %#",
NSMetadataItemFSNameKey, filePattern]];
[query startQuery];
My metadata query may be at fault, or there may be more issues. Any help would be greatly appreciated!
I assume you are on iOS, which means on your second device the media file hasn't been downloaded (iOS doesn't download iCloud files until you actually access them, OS X downloads everything - see the docs).
To ensure the file is on the device use startDownloadingUbiquitousItemAtURL:error: or coordinateReadingItemAtURL:options:error:byAccessor: if you want to know when it's done (in the Accessor block). You will need to call the later anyway to do your coordinated read, so the first method has limited usefulness.
I follow this nice tutorial http://mipostel.com/index.php/home/70-core-data-migration-standard-migration-part-2 to do my core data migration.
For some strange reason i always get NULL in the mappingModel in these lines:
NSMappingModel *mappingModel = [NSMappingModel mappingModelFromBundles:nil
forSourceModel:sourceModel
destinationModel:destinationModel];
(line 191 in the linked code)
I tried to create a very simple derived version of the model, I recreated a mappingModel a 1000 times, made sure that the mapping model file is in the project directory - but this call always returns NULL.
Anybody has an idea what is wrong here?
ps I was just wondering that setting the migration options is called AFTER the mapping Model is used.
NSURL *storeUrl = [NSURL fileURLWithPath:storePath];
NSError *error;
NSDictionary *pscOptions = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:NO], NSInferMappingModelAutomaticallyOption,
nil];
if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeUrl
options:pscOptions
error:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
(lines 123...)
Anyway
Why can't the mapping model be found ?
pss couldn't help holding back :-) this core data migration stuff is much too complicated and difficult compared to doing simple SQL DB migration - wasting soooo much time.
So a BIG THANKS in advance!
I followed that same tutorial and ended up having to manualy open my mapping model by URL
NSString *mappingModelPath = [[NSBundle mainBundle] pathForResource:#"mappingModel10" ofType:#"cdm"];
NSLog(#"mapping model path:%#", mappingModelPath);
NSURL *mappingModelUrl = [NSURL fileURLWithPath:mappingModelPath];
NSMappingModel *mappingModel = [[NSMappingModel alloc] initWithContentsOfURL:mappingModelUrl];
I found the file name for my mapping model by looking in my App's bundle.
i'm having a very hard issue to solve. I've got this scenario:
My app uses CoreData to storing objects, I want to implement iCloud sync between devices... and my app requires an initial populated database.
The first time I launch my app, it's going to populate my database on the cloud and marks to YES some db'fields as "databaseInstalled". These fields are synced in the cloud too.
Now when another device launch the app for the first time, I was hoping to retrieve the field "databaseInstalled" to check whether inject or not some data but it's wrong...
If databaseInstalled is false, we inject data, if databaseInstalled it's true, we wait for iCloud sync.
The problem is that I retrieve the persistentStoreCoordinator asynchronically because of I don't want to block the app that is waiting to download data from iCloud...
So how can I know a priori if i need to populate the database or it has been filled on another device and I've just to download from iCloud the populated one?
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if((__persistentStoreCoordinator != nil)) {
return __persistentStoreCoordinator;
}
__persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]];
NSPersistentStoreCoordinator *psc = __persistentStoreCoordinator;
// Set up iCloud in another thread:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// ** Note: if you adapt this code for your own use, you MUST change this variable:
NSString *iCloudEnabledAppID = #"this is a secret!";
// ** Note: if you adapt this code for your own use, you should change this variable:
NSString *dataFileName = #"you do not have to know.sqlite";
// ** Note: For basic usage you shouldn't need to change anything else
NSString *iCloudDataDirectoryName = #"Data.nosync";
NSString *iCloudLogsDirectoryName = #"Logs";
NSFileManager *fileManager = [NSFileManager defaultManager];
NSURL *localStore = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:dataFileName];
NSURL *iCloud = [fileManager URLForUbiquityContainerIdentifier:nil];
if (iCloud) {
NSLog(#"iCloud is working");
NSURL *iCloudLogsPath = [NSURL fileURLWithPath:[[iCloud path] stringByAppendingPathComponent:iCloudLogsDirectoryName]];
NSLog(#"iCloudEnabledAppID = %#",iCloudEnabledAppID);
NSLog(#"dataFileName = %#", dataFileName);
NSLog(#"iCloudDataDirectoryName = %#", iCloudDataDirectoryName);
NSLog(#"iCloudLogsDirectoryName = %#", iCloudLogsDirectoryName);
NSLog(#"iCloud = %#", iCloud);
NSLog(#"iCloudLogsPath = %#", iCloudLogsPath);
// da rimuovere
//[fileManager removeItemAtURL:iCloudLogsPath error:nil];
#warning to remove
if([fileManager fileExistsAtPath:[[iCloud path] stringByAppendingPathComponent:iCloudDataDirectoryName]] == NO) {
NSError *fileSystemError;
[fileManager createDirectoryAtPath:[[iCloud path] stringByAppendingPathComponent:iCloudDataDirectoryName]
withIntermediateDirectories:YES
attributes:nil
error:&fileSystemError];
if(fileSystemError != nil) {
NSLog(#"Error creating database directory %#", fileSystemError);
}
}
NSString *iCloudData = [[[iCloud path]
stringByAppendingPathComponent:iCloudDataDirectoryName]
stringByAppendingPathComponent:dataFileName];
//[fileManager removeItemAtPath:iCloudData error:nil];
#warning to remove
NSLog(#"iCloudData = %#", iCloudData);
NSMutableDictionary *options = [NSMutableDictionary dictionary];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption];
[options setObject:iCloudEnabledAppID forKey:NSPersistentStoreUbiquitousContentNameKey];
[options setObject:iCloudLogsPath forKey:NSPersistentStoreUbiquitousContentURLKey];
[psc lock];
[psc addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:[NSURL fileURLWithPath:iCloudData]
options:options
error:nil];
[psc unlock];
}
else {
NSLog(#"iCloud is NOT working - using a local store");
NSLog(#"Local store: %#", localStore.path);
NSMutableDictionary *options = [NSMutableDictionary dictionary];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption];
[psc lock];
[psc addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:localStore
options:options
error:nil];
[psc unlock];
}
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(#"iCloud routine completed.");
Setup *install = [[Setup alloc] init];
if([install shouldMigrate]) {
HUD = [[MBProgressHUD alloc] initWithView:self.window.rootViewController.view];
HUD.delegate = self;
HUD.labelText = NSLocalizedString(#"Sincronizzazione del database", nil);
[self.window.rootViewController.view addSubview:HUD];
[HUD showWhileExecuting:#selector(installDatabase) onTarget:install withObject:nil animated:YES];
}
else {
[[NSNotificationCenter defaultCenter] postNotificationName:#"setupCompleted" object:self];
}
//[[NSNotificationCenter defaultCenter] postNotificationName:#"icloudCompleted" object:self userInfo:nil];
[[NSNotificationCenter defaultCenter] postNotificationName:#"setupCompleted" object:self];
});
});
return __persistentStoreCoordinator;
}
You can't know whether or not there's going to be data available in iCloud until you finish syncing with iCloud. That means that you've got two options:
Make the user wait until the sync is done.
Start up with your default database and merge changes from iCloud when possible.
With iCloud, you need some strategy for resolving conflicts between local data and cloud data because you have to deal with the fact that users might change data on more than one device at the same time. Once you have that in place, it seems pretty clear that the second option above is the better one: users get to start using your app right away, and data from the cloud is merged when it's available.
I had exactly same problem.
Check out my question & my answer to it iCloud + CoreData - how to avoid pre-filled data duplication?
Actually it doesn't work 100% ok. If you dare to try it I can explain you how you might make it work 100% correctly (I haven't tried yet, though).
Taking into account that you have a lot of data to pre-populate my solution might now work out for you.
There is no way to determine whether a data store is being opened for the first time. At least not on iCloud Core Data store. Think of it, iCloud should also work off-line – that is, all changes should be buffered when the user is disconnected from the Internet and then uploaded when the connection is restored. There is no way to check whether a data store was initialized without potentially making the user wait for a few minutes (or even indefinitely if the device is off-line) to ask iCloud's copy of the data sore.
To solve this, you'll need to follow these four simple guidelines:
Have a way to de-duplicate pre-populated records.
Have a way to identify pre-populated records and differentiate it from user-entered ones.
Run the de-duplication process every time new transaction records came in from iCloud.
Only seed data records once per device/account combination.
You can read more details here: http://cutecoder.org/programming/seeding-icloud-core-data/
I have a one to many relationship in my core data model. I need to create a new entity and save it. The entity has a one to many relationship which generated the following code:
- (void)addRelationshipEvent1:(NSSet *)values;
- (void)removeRelationshipEvent1:(NSSet *)values;
.
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
ApplicationRecord *newManagedObject = (ApplicationRecord*)[NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
newManagedObject.startDate = [NSDate date];
newManagedObject.stopDate = [[NSDate date] dateByAddingTimeInterval:120];
//keep adding individual dynamic properties
is it correct to set the -toMany relationship sets to nil initially? Or do I need to initialize an (empty?) set here and assign it? Would I be able to add extra objects later if I set the initial set to nil?
newManagedObject.relationshipEvent1 = nil;
newManagedObject.relationshipEvent2 = nil;
//...
// Save the context.
NSError *error = nil;
if (![context save:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
Alex,
You don't need to intialize your relationships. Just use the supplied accessors or helper functions and Core Data takes care of it. IOW, only worry about the property/relationship when you need to actually use it.
Andrew
I am wanting to set up a basic relationship with two entities in Core Data, but the relationship is either not saving, or is not working properly and I'm not sure why.
The two entities are Character and Avatar, its a one-to-one relationship. A character can have 1 avatar. Technically, it should be a "one avatar can be owned by many characters", but I'll deal with that later.
I want to add characters and assign them an avatar.
There are already 10 avatars in Core Data and 1 character, both of which I've verified via the Terminal and SQLite.
The problem is, I'm having troubling "finding an avatar by a name and then saving the relationship to a character".
So far,
I set up a fetch request called: "frqAvatarWithName" where the Predicate has the following structure:
[quote]
name == $AVATAR_NAME
[/quote]
This is so: I can find an avatar with a certain name; and then I can create a relationship with a character.
Issue 1: It gets to execute the query but then never displays how many records there are.
I get a EXC_BAD_ACCESS error in debug mode and I have traced it back to the fetch request template handling -- so, this must be in error or I have done it wrong.
Issue 2: I am not sure if I am even setting up this "basic" relationship up properly.
[code]
// This code is meant to find an avatar with a certain name and then save the relationship
// between a character and said avatar.
// This is my app delegate file for the moment
// All the files are present, and I have deleted/recreated the app various times
-(void)characterMaker
{
NSLog(#"Inside characterMaker...");
NSError *error = nil;
NSManagedObjectContext *context = [self managedObjectContext];
NSManagedObjectModel *model = [self managedObjectModel];
// Find an avatar with a specific name
NSString *nameToFind = #"avt_player_1";
// Use a Fetch request template
NSDictionary *subs = [NSDictionary dictionaryWithObjectsAndKeys:nameToFind, #"AVATAR_NAME", nil];
NSFetchRequest *fetchRequest = [model fetchRequestFromTemplateWithName:#"frqAvatarWithName"
substitutionVariables:subs];
// Set the entity to use
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Avatar"
inManagedObjectContext:context];
[fetchRequest setEntity:entity];
// Execute the query (it never even reaches this point)
NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
if (fetchedObjects == nil) {
// Handle the error
NSLog(#"Error -- %#", [error localizedDescription]);
abort();
}
NSLog(#"Found %# records", [fetchedObjects count]);
// Print out avatar names
for (Avatar *a in fetchedObjects)
{
NSLog(#"Name = %#", [a valueForKey:#"name"]);
}
// This is where I would use `a` and store it in a character entity, and thus create the relationship
[/code]
I gave up on this and did the whole project with the FMDatabase project and SQLite; I've been able to resolve the problem this way.
Thread closed.