Wie benutze ich die gleiche Datenbank beim updaten von CoreDataStack

Question

Ich aktualisiere meine CoreDataStack in meinem . Aber wenn ich das tue, verliere ich anscheinend die gleiche Datenbank wie der ursprüngliche Stapel. Die Datenbank befindet sich im persistenten Speicher und ich habe die sqlite-URL beim Aktualisieren des Stapels nicht geändert.

self.storeDirectoryURL.URLByAppendingPathComponent("SingleViewCoreData.sqlite") 

Hier ist der ursprüngliche Stapel;

// MARK: - Core Data stack 

lazy var applicationDocumentsDirectory: NSURL = { 
    let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask) 
    return urls[urls.count-1] 
}() 

lazy var managedObjectModel: NSManagedObjectModel = { 
    // The managed object model for the application. This property is not optional. It is a fatal error for the application not to be able to find and load its model. 
    let modelURL = NSBundle.mainBundle().URLForResource("APPNAME", withExtension: "momd")! 
    return NSManagedObjectModel(contentsOfURL: modelURL)! 
}() 

lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = { 
    // Create the coordinator and store 
    let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel) 
    let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite") 
    var failureReason = "There was an error creating or loading the application's saved data." 
    do { 
     try coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil) 
    } catch { 
     // Report any error we got. 
     var dict = [String: AnyObject]() 
     dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data" 
     dict[NSLocalizedFailureReasonErrorKey] = failureReason 

     dict[NSUnderlyingErrorKey] = error as! NSError 
     let wrappedError = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict) 
     // Replace this with code to handle the error appropriately. 
     // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 
     NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)") 
     abort() 
    } 

    return coordinator 
}() 

lazy var managedObjectContext: NSManagedObjectContext = { 
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail. 
    let coordinator = self.persistentStoreCoordinator 
    var managedObjectContext = NSManagedObjectContext(concurrencyType: .MainQueueConcurrencyType) 
    managedObjectContext.persistentStoreCoordinator = coordinator 
    return managedObjectContext 
}() 

New CoreDataStack

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 

    self.setupCoreData() 

    try! managedObjectContext.save() 

    // Setup Ensemble 
    let modelURL = NSBundle.mainBundle().URLForResource("APPNAME", withExtension: "momd") 
    cloudFileSystem = CDEICloudFileSystem(ubiquityContainerIdentifier: nil) 

    ensemble = CDEPersistentStoreEnsemble(ensembleIdentifier: "APPNAME", persistentStoreURL: storeURL, managedObjectModelURL: modelURL!, cloudFileSystem: cloudFileSystem) 
    ensemble.delegate = self 


} 

// MARK: - Core Data stack 

var managedObjectContext: NSManagedObjectContext! 

var storeDirectoryURL: NSURL { 
    return try! NSFileManager.defaultManager().URLForDirectory(.ApplicationSupportDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true) 
} 

var storeURL: NSURL { 
    return self.storeDirectoryURL.URLByAppendingPathComponent("SingleViewCoreData.sqlite") 
} 

func setupCoreData() { 
    let modelURL = NSBundle.mainBundle().URLForResource("APPNAME", withExtension: "momd") 
    let model = NSManagedObjectModel(contentsOfURL: modelURL!) 

    try! NSFileManager.defaultManager().createDirectoryAtURL(self.storeDirectoryURL, withIntermediateDirectories: true, attributes: nil) 

    let coordinator = NSPersistentStoreCoordinator(managedObjectModel: model!) 
    let options = [NSMigratePersistentStoresAutomaticallyOption: true, NSInferMappingModelAutomaticallyOption: true] 
    try! coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: self.storeURL, options: options) 

    managedObjectContext = NSManagedObjectContext(concurrencyType: .MainQueueConcurrencyType) 
    managedObjectContext.persistentStoreCoordinator = coordinator 
    managedObjectContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy 

} 

Wohin gehe ich falsch? Ich muss die Datenbank vom ursprünglichen Stapel verwenden. Die Antwort ist höchstwahrscheinlich offensichtlich, ich bin neu in all dem.

Answer 1

Das Problem ist mit der Initialisierung des Basisverzeichnisses.

Original:

let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask) 

Neu:

return try! NSFileManager.defaultManager().URLForDirectory(.ApplicationSupportDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true) } 

In Originalstapel Sie Dokumente Verzeichnis verwenden und in neu Sie Support-Verzeichnis verwenden.