my UITableView is reordering the results after you navigate away and them come back to the view. it only does it one time though - if you navigate away and then come back a second time the new order doesn't change. does anyone know what could be causing this? thanks for any help. ...
Hi all I have a MOC created in my AppDelegate class. I have a MOC property in my RootView which is set by the AppDelegate with something like: rootView.managedObjectContext = self.managedObjectContext; This rootView creates at some time a ModalView and sets there a MOC property also by the same way. Everything works fine. I can crea...
Hi, I have a core-data object "entity" with 2 fields - "name" (a NSString *) and "type" (a EntityType). EntityType is another core data obect with 1 field - name (NSString *). I am creating and deleting an entity object using the code similar in functionality to the following code - Entity *e1 = [NSEntityDescription insertNewObjectFor...
I have alot of data stored locally (10000+ data records) (not decided on how yet - this is part of the question) How may I implement incremental search on this data (on a specific field)? How should I set up the data locally? XML? plist? sqlite? Should I use Core Data for access? ...
I am trying to use NSManagedObjectContext dependency injection as recommended by Marcus Zarra -- I'm creating an M.O.C. in my AppDelegate and passing it as a retained property to each of my view controllers. Generally this seems to work well, but in a modal table view controller that presents data via an NSFetchedResultsController, I on...
Hi, I have setup my first core data project. Everything works fine until I do the following (in Simulator/Device): • Close App using "Home Button" • Double press "Home Button" and quit the app from background. • Reopen the app As soon as it reopens there is an instant crash with nothing in the log. The last thing logged is "Program ...
Lets say I have a core data model like this one: Item attributes: name type relationships: properties Property attributes: name value realationships: item Each Property is connected to one Item, and each Item many properties. One Property may look exactly the same as another. I know the value of one Property and want to get the ...
I'm having difficulty understanding how to update my fetchedresultscontroller with a new sort. I initialize a frc the standard way in my class. But how exactly do you modify the fetchrequest with a new sortdecription? My app has a sort selector in the appSettings that the user can change on the fly. Is there a way to update the frc dyn...
Hello, I'm crashing with this message : 'NSInvalidArgumentException', reason: 'keypath name not found in entity Obvisouly I'm not querying my entity correctly . //fetching Data NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSManagedObjectContext *context = [(AppDelegate *)[[UIApplication sharedApplication] delegate...
Hi! I have small COCOA Mac OS application to play with core data. I have overridden default save function to do extra job after saving document (automatically save a zip copy also). Every time I save - program crashes with EXC_BAD_ACCESS in line where I call [super writeToURL ...] The good part is - document is being saved properly. He...
Hello, I'm trying to use "insertNewObjectForEntityForName", but I've got a problem with my declaration, I wondered if someone had an opinion on this . This is my implementation : NSManagedObjectContext *context = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext]; // Create Object Shots *newShot = (Sho...
Hi! Can anyone explain differences in practise between NSArrayContoller modes (Class / Entity}? I am just facing some debugging issues in my document based Core Data desktop application (using Entity mode for all my controllers). My database structure became quite complicated and it takes so much time to find wrong bindings (mistyped k...
I have an core data model as follows The attributes property of Page is a set of DictionaryEntry, they are values for my Page objects, much like a standard NSDictionary (except all of the keys and values are strings) I have a Page that has a DictionaryEntry with key="title" and value="Home". How would i form a fetch request to load t...
I have a custom NSManagedObject subclass, say, Person. I also have a UIView registered with -addObserver:forKeyPath:options:context: to observe various properties of a Person, some of which are persistent like "name" and others are just dumb KVO-compliant accessors unrelated to Core Data, like "drinking". @interface Person : NSManagedOb...
Hello all, I am new to Core Data programming and am trying to work out the concepts involved. I have an object called a Lease that has a many-to-many relationship with Apartment objects. Given a Lease object, how do I get a count of the related Apartment objects or an NSArray of the related objects? Thank you! ~~Garth ...
Hi! In my document Core Data application I receive crash with report in console: Cocoa Bindings: Cannot create NSSet from object <_NSControllerObjectProxy: 0x26acb0> of class _NSControllerObjectProxy I have -NSBindingDebugLogLevel 1 startup vargument enebled and I get only this. Is there any way to get more information which class or ...
I know I can set default values either in the datamodel, or in the -awakeFromInsert method of the entity class. For example, to make a "date" property default to the current date: - (void) awakeFromInsert { NSDate *now = [NSDate date]; self.date = now; } How though can I make an "idNumber" property default to one greater than the prev...
Hi there, say i have NSManagedObject A, that has a many-to-many relationship to NSManagedObject B. I have one saved instance of A and B. (not yet related) Now I want A to save the instance of B twice in its relationship, which is of course a set. Though, since its a set it stores only one reference of B. see: (not syntax checked) NS...
Hi, These are the steps i make: I create a simple data model of one table with two propertys. Then I compile the datamodel, and then i build the project. Then i make a new xib file with a view then i drag my entity with the option key to the view and i see a + symbol. Then i let my mouse go and nothing happens.... What am i doing wron...
Quick simple question. Apple's CoreData docs explain how delete rules work on a department's employees relationship. Delete a department, and various different things can happen to the associated employees. But what about an employee's department relationship? Should I set my delete rule to No Action, since I don't want the deletion ...