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52 lines
1.7 KiB
52 lines
1.7 KiB
import Foundation
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import CoreData
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extension NSPersistentContainer {
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typealias ErrorHandler = (NSError) -> Void
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convenience init(defaultContainerWithName name : String, inMemory : Bool = false, errorHandler : ErrorHandler? = nil) {
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self.init(name: name)
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if inMemory {
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let description = NSPersistentStoreDescription()
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description.type = NSInMemoryStoreType
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self.persistentStoreDescriptions = [description]
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}
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self.loadPersistentStores(completionHandler: { (storeDescription, error) in
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if let url = storeDescription.url {
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debugPrint("Core Data database URL", url.path) //kann mit sqlite3 im Terminal aufgerufen werden
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}
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if let error = error as NSError? {
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/*
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Typical reasons for an error here include:
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* The parent directory does not exist, cannot be created, or disallows writing.
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* The persistent store is not accessible, due to permissions or data protection when the device is locked.
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* The device is out of space.
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* The store could not be migrated to the current model version.
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Check the error message to determine what the actual problem was.
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*/
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if let errorHandler = errorHandler {
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errorHandler(error)
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} else {
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fatalError("Unresolved error \(error), \(error.userInfo)")
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}
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}
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})
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}
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func saveViewContext() throws {
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assert(Thread.isMainThread)
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let context = self.viewContext
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if context.hasChanges {
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try context.save()
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}
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}
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}
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