CoreDataCodable-9.swift

class User: NSManagedObject, Codable {
    [...]

    // MARK: - Core Data Managed Object
    @NSManaged var avatarUrl: String?
    @NSManaged var username: String?
    @NSManaged var role: String?

    // MARK: - Decodable
    required convenience init(from decoder: Decoder) throws {
        guard let codingUserInfoKeyManagedObjectContext = CodingUserInfoKey.managedObjectContext,
            let managedObjectContext = decoder.userInfo[codingUserInfoKeyManagedObjectContext] as? NSManagedObjectContext,
            let entity = NSEntityDescription.entity(forEntityName: "User", in: managedObjectContext) else {
            fatalError("Failed to decode User")
        }

        self.init(entity: entity, insertInto: managedObjectContext)

        let container = try decoder.container(keyedBy: CodingKeys.self)
        self.avatarUrl = try container.decodeIfPresent(String.self, forKey: .avatarUrl)
        self.username = try container.decodeIfPresent(String.self, forKey: .username)
        self.role = try container.decodeIfPresent(String.self, forKey: .role)
    }

    [...]
}