- (NSManagedObjectContext *)managedObjectContext {

    if (managedObjectContext != nil) {
        return managedObjectContext;
    }

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
    if (coordinator != nil) {
        managedObjectContext = [TICDSSynchronizedManagedObjectContext new];
        [managedObjectContext setPersistentStoreCoordinator: coordinator];
    }
    return managedObjectContext;
}
- (NSManagedObjectModel *)managedObjectModel {

    if (managedObjectModel != nil) {
        return managedObjectModel;
    }

    //    managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];
    NSString *modelPath = [[NSBundle mainBundle] pathForResource:@"EntryDatabase" ofType:@"momd"];
    NSURL *modelURL = [NSURL fileURLWithPath:modelPath];
    managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];

    return managedObjectModel;
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

    if (persistentStoreCoordinator != nil) {
        return persistentStoreCoordinator;
    }

    NSString *storePath = [[self applicationDocumentsDirectory]
                           stringByAppendingPathComponent:@"CoreDataStore.sqlite"];

    NSFileManager *fileManager = [NSFileManager defaultManager];
    // If the expected store doesn't exist, copy the default store.
    NSLog(@"file exists at path: %@, %i", storePath, [fileManager fileExistsAtPath:storePath]);
    if (![fileManager fileExistsAtPath:storePath]) {
        NSString *defaultStorePath = [[NSBundle mainBundle] pathForResource:@"CoreDataStore" ofType:@"sqlite"];
        if (defaultStorePath) {
            [fileManager copyItemAtPath:defaultStorePath toPath:storePath error:NULL];
        }
    }

    persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];

    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]);
    }

    return persistentStoreCoordinator;
}

- (BOOL)checkForMigration
{
    BOOL migrationSuccess = NO;
    NSString *storeSourcePath = [[self applicationDocumentsDirectory]
                                 stringByAppendingPathComponent:@"CoreDataStoreNew.sqlite"];
    NSFileManager *fileManager = [NSFileManager defaultManager];

    if (![fileManager fileExistsAtPath:storeSourcePath]) {
        //Version 2 SQL has not been created yet, so the source is still version 1...
        storeSourcePath = [[self applicationDocumentsDirectory]
                           stringByAppendingPathComponent:@"CoreDataStore.sqlite"];
    }

    NSURL *storeSourceUrl = [NSURL fileURLWithPath: storeSourcePath];
    NSError *error = nil;
    NSDictionary *sourceMetadata = [NSPersistentStoreCoordinator
                                    metadataForPersistentStoreOfType:NSSQLiteStoreType
                                    URL:storeSourceUrl
                                    error:&error];
    if (sourceMetadata) {
        NSString *configuration = nil;
        NSManagedObjectModel *destinationModel = [self.persistentStoreCoordinator managedObjectModel];

        //Our Source 1 is going to be incompatible with the Version 2 Model, our Source 2 won't be...
        BOOL pscCompatible = [destinationModel isConfiguration:configuration compatibleWithStoreMetadata:sourceMetadata];
        NSLog(@"Is the STORE data COMPATIBLE? %@", (pscCompatible==YES) ?@"YES" :@"NO");

        if (pscCompatible == NO) {
            migrationSuccess = [self performMigrationWithSourceMetadata:sourceMetadata toDestinationModel:destinationModel];
        }
    }
    else {
        NSLog(@"checkForMigration FAIL - No Source Metadata! nERROR: %@", [error localizedDescription]);
    }
    return migrationSuccess;
}


- (BOOL)performMigrationWithSourceMetadata :(NSDictionary *)sourceMetadata
                         toDestinationModel:(NSManagedObjectModel *)destinationModel
{


    BOOL migrationSuccess = NO;
    //Initialise a Migration Manager...
    NSManagedObjectModel *sourceModel = [NSManagedObjectModel mergedModelFromBundles:nil
                                                                    forStoreMetadata:sourceMetadata];
    //Perform the migration...
    if (sourceModel) {
        NSMigrationManager *standardMigrationManager = [[NSMigrationManager alloc]
                                                        initWithSourceModel:sourceModel
                                                        destinationModel:destinationModel];

        NSArray *mappingModelNames = [NSArray arrayWithObjects:@"StepOne", @"StepTwo", nil];
        NSDictionary *sourceStoreOptions = nil;

        NSString *destinationStorePath = [[self applicationDocumentsDirectory]
                                          stringByAppendingPathComponent:@"CoreDataStoreNew.sqlite"];

        NSURL *destinationStoreURL = [NSURL fileURLWithPath: destinationStorePath];

        NSString *destinationStoreType = NSSQLiteStoreType;

        NSDictionary *destinationStoreOptions = nil;

        for (NSString *mappingModelName in mappingModelNames) {

            NSError *error;

            NSURL *fileURL = [[NSBundle mainBundle] URLForResource:mappingModelName withExtension:@"cdm"];

            NSMappingModel *mappingModel = [[NSMappingModel alloc] initWithContentsOfURL:fileURL];

            migrationSuccess = [standardMigrationManager migrateStoreFromURL:destinationStoreURL
                                                                        type:NSSQLiteStoreType
                                                                     options:sourceStoreOptions
                                                            withMappingModel:mappingModel
                                                            toDestinationURL:destinationStoreURL
                                                             destinationType:destinationStoreType
                                                          destinationOptions:destinationStoreOptions
                                                                       error:&error];

            NSLog(@"Error: %@", error);
        }

    }

    return migrationSuccess;

}

if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
                                              configuration:nil
                                                        URL:storeUrl
                                                    options:pscOptions
                                                      error:&error]) {