"Unable to find any mappings for the given content, keyPath=null" RestKit 0.2
- by abisson
So I switched to using RestKit 0.2 and CoreData and I've been having a lot of trouble trying to get the mappings correct... I don't understand why. The JSON Response of my server is like this:
{
"meta":
{
"limit": 20,
"next": null,
"offset": 0,
"previous": null,
"total_count": 2
},
"objects":
[{
"creation_date": "2012-10-15T20:16:47",
"description": "",
"id": 1,
"last_modified":
"2012-10-15T20:16:47",
"order": 1,
"other_names": "",
"primary_name": "Mixing",
"production_line": "/api/rest/productionlines/1/",
"resource_uri": "/api/rest/cells/1/"
},
{
"creation_date": "2012-10-15T20:16:47",
"description": "",
"id": 2,
"last_modified": "2012-10-15T20:16:47",
"order": 2, "other_names": "",
"primary_name": "Packaging",
"production_line": "/api/rest/productionlines/1/",
"resource_uri": "/api/rest/cells/2/"
}]
}
Then in XCode I have:
RKObjectManager *objectManager = [RKObjectManager sharedManager];
[AFNetworkActivityIndicatorManager sharedManager].enabled = YES;
NSManagedObjectModel *managedObjectModel = [NSManagedObjectModel mergedModelFromBundles:nil];
RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel];
objectManager.managedObjectStore = managedObjectStore;
RKEntityMapping *cellMapping = [RKEntityMapping mappingForEntityForName:@"Cell" inManagedObjectStore:managedObjectStore];
cellMapping.primaryKeyAttribute = @"identifier";
[cellMapping addAttributeMappingsFromDictionary:@{
@"id": @"identifier",
@"primary_name": @"primaryName",
}];
RKResponseDescriptor *responseCell = [RKResponseDescriptor responseDescriptorWithMapping:cellMapping
pathPattern:@"/api/rest/cells/?format=json"
keyPath:@"objects"
statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptorsFromArray:@[responseCell, responseUser, responseCompany]];
[managedObjectStore createPersistentStoreCoordinator];
NSString *storePath = [RKApplicationDataDirectory() stringByAppendingPathComponent:@"AppDB.sqlite"];
NSString *seedPath = [[NSBundle mainBundle] pathForResource:@"SeedDatabase" ofType:@"sqlite"];
NSError *error;
NSPersistentStore *persistentStore = [managedObjectStore addSQLitePersistentStoreAtPath:storePath fromSeedDatabaseAtPath:seedPath withConfiguration:nil options:nil error:&error];
NSAssert(persistentStore, @"Failed to add persistent store with error: %@", error);
// Create the managed object contexts
[managedObjectStore createManagedObjectContexts];
// Configure a managed object cache to ensure we do not create duplicate objects
managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache alloc] initWithManagedObjectContext:managedObjectStore.persistentStoreManagedObjectContext];
My request is:
[[RKObjectManager sharedManager] getObjectsAtPath:@"/api/rest/cells/?format=json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
RKLogInfo(@"Load complete: Table should refresh...");
[[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"LastUpdatedAt"];
[[NSUserDefaults standardUserDefaults] synchronize];
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
RKLogError(@"Load failed with error: %@", error);
}];
And I always get the following error:
**Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "Unable to find any mappings for the given content" UserInfo=0x1102d500 {DetailedErrors=(), NSLocalizedDescription=Unable to find any mappings for the given content, keyPath=null}**
Thanks a lot!
