ManagedObjectAdapter

ManagedObjectAdapter is a lightweight adapter for the converts between Model instances and Core Data managed objects.

How To Get Started

Carthage

Specify "ManagedObjectAdapter" in your Cartfile:

github "teambition/ManagedObjectAdapter"

Usage

Models that you want to use ManagedObjectAdapter must be a subclass of NSObject and conform to ManagedObjectSerializing protocol.

protocol ManagedObjectSerializing {
    static func managedObjectEntityName() -> String
    static func managedObjectKeysByPropertyKey() -> [String: String]
    static func valueTransformersByPropertyKey() -> [String: ValueTransformer]
    static func relationshipModelClassesByPropertyKey() -> [String: AnyClass]
    static func propertyKeysForManagedObjectUniquing() -> Set<String>
}

You can use ManagedObjectAdapter like this:

@objcMembers
class TestModel: NSObject, ManagedObjectSerializing {
    var id: String?

    // Property name of this property in xcdatamodeld is "downloadUrl"
    var downloadURL: URL?

    // Type of this property in xcdatamodeld is Transformable
    var transformableModel: TransformableModel?

    // Type of this property in xcdatamodeld is to many relationship
    var relationshipModels: Set<RelationshipModel>?

    required override init() { }

    static func managedObjectKeysByPropertyKey() -> [String: String] {
        return ["downloadURL": "downloadUrl"]
    }

    static func valueTransformersByPropertyKey() -> [String: ValueTransformer] {
        return ["transformableModel": TransformableModelTransformer()]
    }

    static func propertyKeysForManagedObjectUniquing() -> Set<String> {
        return ["id"]
    }

    static func relationshipModelClassesByPropertyKey() -> [String: AnyClass] {
        return ["relationshipModels": RelationshipModel.self]
    }
}

class TransformableModel: NSObject, ManagedObjectSerializing {
    var id: String?

    required override init() { }
}

class RelationshipModel: NSObject, ManagedObjectSerializing {
    var id: String?

    required override init() { }
}

class TransformableModelTransformer: ValueTransformer {
    override func transformedValue(_ value: Any?) -> Any? {
        // Model to Data
    }

    override func reverseTransformedValue(_ value: Any?) -> Any? {
        // Data to Model
    }
}

let managedObjectContext = ...
let originModel = ...
let moTestModel = originModel.toManagedObject(in: managedObjectContext)
let testModel = TestModel.model(from: moTestModel!)

Minimum Requirement

iOS 8.0

Release Notes

• Release Notes

License

ManagedObjectAdapter is released under the MIT license. See LICENSE for details.

More Info

Have a question? Please open an issue!