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add ability to remove all cached Profiles in ProfileDatabase
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31d327a085
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@ -115,4 +115,24 @@ final class ProfileDatabase {
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let count = try? persistent_container?.viewContext.count(for: request)
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return count ?? 0
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}
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func remove_all_profiles() throws {
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guard let context = background_context, let container = persistent_container else {
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throw ProfileDatabaseError.missing_context
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}
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let request = NSFetchRequest<NSFetchRequestResult>(entityName: entity_name)
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let batch_delete_request = NSBatchDeleteRequest(fetchRequest: request)
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batch_delete_request.resultType = .resultTypeObjectIDs
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let result = try container.persistentStoreCoordinator.execute(batch_delete_request, with: context) as! NSBatchDeleteResult
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// NSBatchDeleteRequest is an NSPersistentStoreRequest, which operates on disk. So now we'll manually update our in-memory context.
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if let object_ids = result.result as? [NSManagedObjectID] {
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let changes: [AnyHashable: Any] = [
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NSDeletedObjectsKey: object_ids
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]
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NSManagedObjectContext.mergeChanges(fromRemoteContextSave: changes, into: [context])
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}
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}
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}
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