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<?xml version="1.0" encoding="UTF-8" standalone="yes"?> |
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<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="21754" systemVersion="22F82" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier=""> |
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<entity name="PersistentThing" representedClassName="PersistentThing" syncable="YES" codeGenerationType="class"> |
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<attribute name="createdAt" optional="YES" attributeType="Date" usesScalarValueType="NO"/> |
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<attribute name="text" optional="YES" attributeType="String"/> |
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<attribute name="uuid" optional="YES" attributeType="UUID" usesScalarValueType="NO"/> |
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</entity> |
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</model> |
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// |
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// PersistenceController.swift |
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// JustOneThing |
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// |
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// Created by Alan Francis on 07/07/2023. |
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// |
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|
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import CoreData |
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|
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//MARK: - URL Extension |
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// https://developer.apple.com/forums/thread/78120 |
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// There's an issue with tvOS and the path to the local DB. |
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// This little extension encapsulates that |
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public extension URL { |
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/// Returns a URL for the given app group and database pointing to the sqlite database. |
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static func storeURL(for appGroup: String, databaseName: String) -> URL { |
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var containerUrl:URL |
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|
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guard let initialContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup) else { |
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fatalError("Shared file container could not be created.") |
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} |
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|
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#if os(tvOS) |
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containerUrl = initialContainer.appendingPathComponent("Library/Caches") |
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#else |
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containerUrl = initialContainer |
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#endif |
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|
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return containerUrl.appendingPathComponent("\(databaseName).sqlite") |
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} |
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} |
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|
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//MARK: - PeristenceController |
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struct PersistenceController { |
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let container: NSPersistentCloudKitContainer |
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init(inMemory: Bool = false) { |
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container = NSPersistentCloudKitContainer(name: "JustOneThingCloudModel") |
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if inMemory { |
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container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") |
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} else { |
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let url = URL.storeURL(for: "group.com.alancfrancis.apps.JustOneThing", databaseName: "JustOneThingCloudModel") |
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container.persistentStoreDescriptions.first!.url = url |
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} |
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|
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container.loadPersistentStores(completionHandler: { (storeDescription, error) in |
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if let error = error as NSError? { |
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Self.processError(error:error) |
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} |
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}) |
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container.viewContext.automaticallyMergesChangesFromParent = true |
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} |
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} |
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|
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//MARK: - static convenience |
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extension PersistenceController { |
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static let shared = PersistenceController() |
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var viewContext:NSManagedObjectContext { |
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get { |
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container.viewContext |
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} |
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} |
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} |
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|
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//MARK: - error handling |
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extension PersistenceController { |
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static func processError(error:NSError) { |
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// Replace this implementation with code to handle the error appropriately. |
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// fatalError() 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. |
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|
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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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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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|
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