CoreDataStack

CoreDataStack in Swift

Repository Usage:

Create repository:

To create a Repository Object:

let repository = Repository<User>()

Here User is a subclass of NSManagedObject.

To insert new row

To create new object use the method create(in:with:) as follows:

let user: User = repository.create { (user) in
    user.id = 2
    user.name = "Test User"
}

By default Repository class use writeContext of CoreDataStack, alternatively you can pass your own context. Like:

let user: User = repository.create(in: CoreDataStack.shared.mainContext) { (user) in
    user.id = 2
    user.name = "Test User"
}

To fetch data from an Entity

To fetch the data use the method fetch(with:in:).

Fetching all results:

let users: [User] = try repository.fetch()

Fetching with predicate:

let predicate = NSPredicate(format: "name like '*3'")
let users: [User] = try repository.fetch(with: predicate)

To delete object from Entity:

To delete the rows from an entity use delete(entity:in:) or delete(entities:in:) or delete(in:with:in: ) methods.

Delete single object:

repository.delete(entity: object)

or

repository.delete(entity: object, in: CoreDataStack.shared.mainContext)

Delete multiple objects:

repository.delete(entities: objects)

or

repository.delete(entities: objects, in: CoreDataStack.shared.mainContext)

Delete multiple objects with predicate:

Here you have to pass the Type of Entity from which you want to delete data.

let predicate = NSPredicate(format: "name like '*3'")
try repository.delete(in: User.self, with: predicate)

or

let predicate = NSPredicate(format: "name like '*3'")
try repository.delete(in: User.self, with: predicate, in: CoreDataStack.shared.mainContext)