Restkit 0.20 objects are not mapped after getting json response - iphone

Question

I'm using RestKit 0.20. I'm trying to download the json response from the local rails application and save it to core-data. I tried to follow https://github.com/RestKit/RKGist/blob/master/TUTORIAL.md and everything worked fine.
I wanted to use this many times so i made it a base class(ListController) and subclassed it to SessionListController and EventListController. The mapping is provided in AppDelegate.m.
The app has a first viewcontroller which is the root controller which always maps the responses and everything works fine. But as soon as i change the viewcontroller i will get the response and the operation stops. it does't even say if the mapping has started. I'm not sure what i have missed.
Here i'm initialising restkit
AppDelegate.m
#import "AppDelegate.h"
#import <UIKit/UIKit.h>
#implementation AppDelegate
RKEntityMapping *eventEntityMapping,*sessionEntitiyMapping;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSError *error = nil;
NSURL *modelURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"event" ofType:#"momd"]];
NSManagedObjectModel *managedObjectModel = [[[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL] mutableCopy];
[self setManagedObjectStore: [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel]];
// Initialize the Core Data stack
[self.managedObjectStore createPersistentStoreCoordinator];
NSPersistentStore __unused *persistentStore = [self.managedObjectStore addInMemoryPersistentStore:&error];
NSAssert(persistentStore, #"Failed to add persistent store: %#", error);
[self.managedObjectStore createManagedObjectContexts];
// Set the default store shared instance
[RKManagedObjectStore setDefaultStore:self.managedObjectStore];
NSString *url=#"http://192.168.11.11:3000";
RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:url]];
objectManager.managedObjectStore = self.managedObjectStore;
[RKObjectManager setSharedManager:objectManager];
[self mapEntities];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:eventEntityMapping pathPattern:#"/api/v1/events" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptor:responseDescriptor];
RKResponseDescriptor *responseDescriptor2 = [RKResponseDescriptor responseDescriptorWithMapping:sessionEntitiyMapping pathPattern:#"/api/v1/sessions" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptor:responseDescriptor2];
// Override point for customization after application launch.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UINavigationController *navigationController = [storyboard instantiateViewControllerWithIdentifier:#"mainCenterController"];
IIViewDeckController* secondDeckController = [[IIViewDeckController alloc] initWithCenterViewController:navigationController
leftViewController:[storyboard instantiateViewControllerWithIdentifier:#"sideBarController"]];
secondDeckController.centerhiddenInteractivity=IIViewDeckCenterHiddenNotUserInteractiveWithTapToClose;
self.window.rootViewController = secondDeckController;
return YES;
}
-(void)mapEntities{
//event
eventEntityMapping = [RKEntityMapping mappingForEntityForName:#"Event" inManagedObjectStore:self.managedObjectStore];
[eventEntityMapping addAttributeMappingsFromDictionary:#{
#"id": #"event_id",
#"name": #"name",
#"description": #"desc",
#"no_of_days": #"no_of_days",
#"start_date": #"start_date",
}];
eventEntityMapping.identificationAttributes = #[ #"event_id" ];
sessionEntitiyMapping = [RKEntityMapping mappingForEntityForName:#"Session" inManagedObjectStore:self.managedObjectStore];
[sessionEntitiyMapping addAttributeMappingsFromDictionary:#{
#"name": #"name",
#"description": #"desc",
#"start_time": #"start_time",
#"duration": #"duration",
#"location_id": #"location_id",
#"event_id": #"event_id",
#"id": #"session_id",
}];
sessionEntitiyMapping.identificationAttributes = #[ #"session_id" ];
}
Base class where i'm calling getObjectsAtPath for RKManager depending on the base class.
ListController.m
#implementation ListController
- (void)viewDidLoad
{
[super viewDidLoad];
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
self.managedObjectContext = appDelegate.managedObjectStore.mainQueueManagedObjectContext;
[self loadLocs];
[self.refreshControl beginRefreshing];
}
-(void)setModel:(Models)model{
if(self.model!=model){
_model=model;
self.title=[Model displayFor:self.model];
_fetchedResultsController = nil;
[self.tableView reloadData];
[self loadLocs];
[self.refreshControl beginRefreshing];
}
}
- (void)loadLocs
{
[[RKObjectManager sharedManager] getObjectsAtPath:[Model listApiFor:self.model]
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
[self.refreshControl endRefreshing];
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
[self.refreshControl endRefreshing];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"An Error Has Occurred" message:[error localizedDescription] delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
NSLog(#"error: %#",error);
[alertView show];
}];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[[self fetchedRCforTableView:tableView] sections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
id <NSFetchedResultsSectionInfo> sectionInfo = [self.fetchedResultsController sections][section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
[self configureCell:cell atIndexPath:indexPath forTableView:tableView];
return cell;
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (_fetchedResultsController != nil) {
return _fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:[Model entityFor:self.model] inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:[Model sortDescriptorFor:self.model] ascending:YES];
NSArray *sortDescriptors = #[sortDescriptor];
[fetchRequest setSortDescriptors:sortDescriptors];
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:[Model displayFor:self.model]];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
NSLog(#"_fetchedResultsController count %d",_fetchedResultsController.fetchedObjects.count);
return _fetchedResultsController;
}
#end
This is one of the base classes where i set the model name
EventViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.model=Eventm;
// Do any additional setup after loading the view.
}
SessionViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.model=Sessionm;
// Do any additional setup after loading the view.
}
Full code is at https://github.com/leohemanth/event-app
After using
RKLogConfigureByName("RestKit", RKLogLevelWarning);
RKLogConfigureByName("RestKit/ObjectMapping", RKLogLevelTrace);
RKLogConfigureByName("RestKit/Network", RKLogLevelTrace);
I can see that, i'm getting proper Http response but it is not being mapped. Which i'm not sure why?

Answer 1

I've just updated my Restkit package to 0.20.2. I'm not facing the problem now. It should be fixed in the update.