How do I create protocol-driven abstractions with Core Data in Swift?

Creating protocol-driven abstractions with Core Data in Swift allows for cleaner and more testable code. By defining protocols to handle your Core Data operations, you can abstract away the details and make your codebase more modular.

// Define a protocol for a Core Data entity protocol CoreDataEntity { associatedtype EntityType: NSManagedObject var entity: EntityType { get } func save() throws func fetchAll() throws -> [EntityType] } // Implement the protocol for a specific entity class User: CoreDataEntity { var entity: UserEntity { // Assume UserEntity is your NSManagedObject subclass // return instance logic here } func save() throws { // Implement save logic } func fetchAll() throws -> [UserEntity] { // Implement fetching logic } }

protocol-driven Core Data Swift abstractions modular code testing

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