我刚刚在CoreData中删除了我的实体的属性，之后出现了这个错误：
2016-02-02 21：37：54.499 toRep_Management [32110：4679391] CoreData：错误：-addPersistentStoreWithType：XML配置：（null）URL：file：/// Users / Tom / Library / Application％20Support / de .toEducate.toRep_Management / CocoaAppCD.storedata选项：{ NSInferMappingModelAutomaticallyOption = 1; NSMigratePersistentStoresAutomaticallyOption = 1; } ...返回错误错误Domain = NSCocoaErrorDomain Code = 134130“持久存储迁移失败，缺少源管理对象模型。” UserInfo = {URL = file：///Users/Tom/Library/Application%20Support/de.toEducate.toRep_Management/CocoaAppCD.storedata,metadata = {type = immutable dict，count = 6， entries =＆gt; 0：{contents =“NSStoreUUID”} = {contents =“A3FD787E-495C-493D-A3B9-2E7F7925EF7C”} 3：{contents =“NSStoreModelVersionIdentifiers”} =（ “” ） 4：{contents =“NSStoreType”} = {contents =“XML”} 10：{contents =“NSPersistenceFrameworkVersion”} = {value = + 641，type = kCFNumberSInt64Type} 11：{contents =“NSStoreModelVersionHashes”} = {type = mutable dict，count = 1， entries =＆gt; 0：注意= {length = 32，capacity = 32，bytes = 0xd22eaaf9bb53e406e8914544584e0e72 ... 0899bacb36b735bd} } 12：{contents =“NSStoreModelVersionHashesVersion”} = {value = + 3，type = kCFNumberSInt64Type} } ，reason =使用userInfo字典找不到源存储的模型} URL =“file：///Users/Tom/Library/Application%20Support/de.toEducate.toRep_Management/CocoaAppCD.storedata”; metadata = { NSPersistenceFrameworkVersion = 641; NSStoreModelVersionHashes = { 注意=; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ “” ）; NSStoreType = XML; NSStoreUUID =“A3FD787E-495C-493D-A3B9-2E7F7925EF7C”; }; reason =“找不到源存储的模型”; } 2016-02-02 21：37：54.499 toRep_Management [32110：4679391] CoreData：注释：NSPersistentStoreCoordinator的当前模型哈希是{ 注意=＆lt; 2465d170 cdc5f276 8e769b4d 25c03a0d 8efb193b 6707ab4d 46419c42 17733df1＆gt ;; }
我以为我正确实现了轻量级迁移，但现在我不再确定了。
我的AppDelegate：
func applicationDidFinishLaunching(aNotification: NSNotification) {
// Insert code here to initialize your application
}
func applicationWillTerminate(aNotification: NSNotification) {
// Insert code here to tear down your application
}
// MARK: - Core Data stack
lazy var applicationDocumentsDirectory: NSURL = {
// The directory the application uses to store the Core Data store file. This code uses a directory named "de.toEducate.toRep_Management" in the user's Application Support directory.
let urls = NSFileManager.defaultManager().URLsForDirectory(.ApplicationSupportDirectory, inDomains: .UserDomainMask)
let appSupportURL = urls[urls.count - 1]
return appSupportURL.URLByAppendingPathComponent("de.toEducate.toRep_Management")
}()
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("toRep_Management", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!
}()
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {
// The persistent store coordinator for the application. This implementation creates and returns a coordinator, having added the store for the application to it. (The directory for the store is created, if necessary.) This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
let fileManager = NSFileManager.defaultManager()
var failError: NSError? = nil
var shouldFail = false
var failureReason = "There was an error creating or loading the application's saved data."
// Make sure the application files directory is there
do {
let properties = try self.applicationDocumentsDirectory.resourceValuesForKeys([NSURLIsDirectoryKey])
if !properties[NSURLIsDirectoryKey]!.boolValue {
failureReason = "Expected a folder to store application data, found a file \(self.applicationDocumentsDirectory.path)."
shouldFail = true
}
} catch {
let nserror = error as NSError
if nserror.code == NSFileReadNoSuchFileError {
do {
try fileManager.createDirectoryAtPath(self.applicationDocumentsDirectory.path!, withIntermediateDirectories: true, attributes: nil)
} catch {
failError = nserror
}
} else {
failError = nserror
}
}
// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? = nil
let migrateOptions = [NSMigratePersistentStoresAutomaticallyOption: true, NSInferMappingModelAutomaticallyOption: true]
if failError == nil {
coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("CocoaAppCD.storedata")
do {
try coordinator!.addPersistentStoreWithType(NSXMLStoreType, configuration: nil, URL: url, options: migrateOptions)
} catch {
failError = error as NSError
}
}
if shouldFail || (failError != nil) {
// Report any error we got.
var dict = [String: AnyObject]()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
if failError != nil {
dict[NSUnderlyingErrorKey] = failError
}
let error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
NSApplication.sharedApplication().presentError(error)
abort()
} else {
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
}()
// MARK: - Core Data Saving and Undo support
@IBAction func saveAction(sender: AnyObject!) {
// Performs the save action for the application, which is to send the save: message to the application's managed object context. Any encountered errors are presented to the user.
if !managedObjectContext.commitEditing() {
NSLog("\(NSStringFromClass(self.dynamicType)) unable to commit editing before saving")
}
if managedObjectContext.hasChanges {
do {
try managedObjectContext.save()
} catch {
let nserror = error as NSError
NSApplication.sharedApplication().presentError(nserror)
}
}
}
func windowWillReturnUndoManager(window: NSWindow) -> NSUndoManager? {
// Returns the NSUndoManager for the application. In this case, the manager returned is that of the managed object context for the application.
return managedObjectContext.undoManager
}
func applicationShouldTerminate(sender: NSApplication) -> NSApplicationTerminateReply {
// Save changes in the application's managed object context before the application terminates.
if !managedObjectContext.commitEditing() {
NSLog("\(NSStringFromClass(self.dynamicType)) unable to commit editing to terminate")
return .TerminateCancel
}
if !managedObjectContext.hasChanges {
return .TerminateNow
}
do {
try managedObjectContext.save()
} catch {
let nserror = error as NSError
// Customize this code block to include application-specific recovery steps.
let result = sender.presentError(nserror)
if (result) {
return .TerminateCancel
}
let question = NSLocalizedString("Could not save changes while quitting. Quit anyway?", comment: "Quit without saves error question message")
let info = NSLocalizedString("Quitting now will lose any changes you have made since the last successful save", comment: "Quit without saves error question info");
let quitButton = NSLocalizedString("Quit anyway", comment: "Quit anyway button title")
let cancelButton = NSLocalizedString("Cancel", comment: "Cancel button title")
let alert = NSAlert()
alert.messageText = question
alert.informativeText = info
alert.addButtonWithTitle(quitButton)
alert.addButtonWithTitle(cancelButton)
let answer = alert.runModal()
if answer == NSAlertFirstButtonReturn {
return .TerminateCancel
}
}
// If we got here, it is time to quit.
return .TerminateNow
}
任何人都可以帮助解决错误，如何在以后通过更好的迁移来解决这个问题？
答案 0 :(得分：0)
“找不到源存储的模型”意味着您正在尝试进行模型迁移，但Core Data无法找到旧版本的数据模型。要迁移到工作，您需要同时拥有旧版本和新版本。该错误表明您只有新版本。
当您要更改数据模型并迁移数据时，需要在项目中创建新版本的模型。您可以通过在Xcode中选择模型文件并使用“Editor”菜单 - ＆gt;来完成此操作。 “添加模型版本”。然后，您将对新版本进行更改，同时保留旧版本。
您需要恢复旧模型。最好的方法是回顾一下你的SCM（可能是git）提交并获得它。