Swiftpack.co - Package - dmytro-anokhin/core-data-model-description

CoreDataModelDescription

Declarative way to describe a Core Data model in code.

Usage

Use CoreDataModelDescription to describe your model. Sample code describes this model:

Image of Author, Publication, and Article model

Assuming you already defined Author, Publication, and Article subclasses of NSManagedObject.

let modelDescription = CoreDataModelDescription(
    entities: [
        .entity(
            name: "Author",
            managedObjectClass: Author.self,
            attributes: [
                .attribute(name: "name", type: .stringAttributeType)
            ],
            relationships: [
                .relationship(name: "publications", destination: "Publication", toMany: true, deleteRule: .cascadeDeleteRule, inverse: "author")
            ]),
        .entity(
            name: "Publication",
            managedObjectClass: Publication.self,
            attributes: [
                .attribute(name: "publicationDate", type: .dateAttributeType),
                .attribute(name: "numberOfViews", type: .integer64AttributeType, isOptional: true)
            ],
            relationships: [
                .relationship(name: "author", destination: "Author", toMany: false, inverse: "publications")
            ]),
        .entity(
            name: "Article",
            managedObjectClass: Article.self,
            parentEntity: "Publication",
            attributes: [
                .attribute(name: "text", type: .stringAttributeType)
            ])
    ]
)

let model = modelDescription.makeModel()

Motivation

Motivation and creating this package described in my article Core Data and Swift Package Manager.

This package is still on early stage of development. Please submit issues for missing functionality. Pull requests are more than welcome.

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Dependencies

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