RestKit Mapping Invalid parameter not satisfying: managedObjectStore - ios

Question

Possible duplication : RestKit Core Data 'managedObjectStore is nil'
Could somebody explain me why when I run my application I get error like :
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: managedObjectStore'
*** First throw call stack
It happened to me only in my MainViewController when I'm calling the following method:
-(void)loadLocationsOfWearers{
RKManagedObjectStore *store = [[DateModel sharedDataModel] objectStore];
NSIndexSet *statusCodeSet= RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);
RKMapping *mapping = [MappingProvider watchesMapping];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method:RKRequestMethodAny pathPattern:nil keyPath:#"watch" statusCodes:statusCodeSet];
NSURL *url = [NSURL URLWithString:kSERVER_ADDR];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
RKManagedObjectRequestOperation *operation =[[RKManagedObjectRequestOperation alloc] initWithRequest:request responseDescriptors:#[responseDescriptor]];
operation.managedObjectCache = store.managedObjectCache;
operation.managedObjectContext = store.mainQueueManagedObjectContext;
[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
_wearerList = mappingResult.array;
NSLog(#"Results:\n %#",mappingResult.dictionary);
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"ERROR: %#", error);
NSLog(#"Response: %#", operation.HTTPRequestOperation.responseString);
}];
[operation start];
}
When I'm calling this method in other ViewControllers everything works fine.
It looks like my managedObjectStore is nil, but I don't know what is the reason for that...
Please take a look at my DateModel code and share with me your ideas:
#implementation DateModel
+ (id)sharedDataModel
{
static DateModel *__sharedDataModel = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
__sharedDataModel = [[DateModel alloc] init];
});
return __sharedDataModel;
}
- (NSManagedObjectModel *)managedObjectModel
{
return [NSManagedObjectModel mergedModelFromBundles:nil];
}
- (id)optionsForSqliteStore
{
return #{
NSInferMappingModelAutomaticallyOption: #YES,
NSMigratePersistentStoresAutomaticallyOption: #YES
};
}
- (void)setup
{
self.objectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSString *path = [RKApplicationDataDirectory() stringByAppendingPathComponent:#"Data.sqlite"];
NSLog(#"Setting up store at %#", path);
NSError *error;
[self.objectStore addSQLitePersistentStoreAtPath:path
fromSeedDatabaseAtPath:nil
withConfiguration:nil
options:[self optionsForSqliteStore]
error:&error];
[self.objectStore createManagedObjectContexts];
self.objectStore.managedObjectCache =[[RKInMemoryManagedObjectCache alloc]initWithManagedObjectContext:self.objectStore.persistentStoreManagedObjectContext];
[RKManagedObjectStore setDefaultStore:self.objectStore];
}
In my AppDelegate method I just simply setup my store.
-(void)setupCoreData
{
[[DateModel sharedDataModel]setup];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self setupCoreData];
}
When I run my application I'm getting error like on the screen below:
+(RKMapping *)watchesMapping
{
RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:#"Watches" inManagedObjectStore:[[DateModel sharedDataModel]objectStore]];
[mapping addAttributeMappingsFromDictionary:#{
#"id": #"watch_id",
#"altitude":#"altitude",
#"battery_life":#"battery_life",
#"button_press_time":#"button_press_time",
#"charging_status":#"charging_status",
#"gmaps":#"gmaps",
#"id_addr":#"id_addr",
#"last_keep_alive":#"last_keep_alive",
#"last_update_time":#"last_update_time",
#"latitude":#"latitude",
#"longitude":#"longitude",
#"location":#"location",
#"network":#"network",
#"phonewatchno":#"phonewatchno",
#"rssi":#"rssi",
#"short_imei":#"short_imei",
#"updated_at":#"updated_at",
#"voltage":#"voltage",
#"waerer_id":#"wearer_id",
#"updated_at":#"updated_at",
#"token":#"token"
}
];
[mapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"alerts" toKeyPath:#"alerts" withMapping:[MappingProvider alertsMapping]]];
return mapping;
}

Answer 1

loadLocationsOfWearers is being called too soon (before setupCoreData is called). Call it later, or call setupCoreData when the data model singleton is created.