クイック スタート - Swift SDK

import RealmSwift

class Todo: Object {
   @Persisted(primaryKey: true) var _id: ObjectId
   @Persisted var name: String = ""
   @Persisted var status: String = ""
   @Persisted var ownerId: String
   convenience init(name: String, ownerId: String) {
       self.init()
       self.name = name
       self.ownerId = ownerId
   }
}

// Open the local-only default realm
let realm = try! Realm()

let todo = Todo(name: "Do laundry", ownerId: user.id)
try! realm.write {
    realm.add(todo)
}

// Get all todos in the realm
let todos = realm.objects(Todo.self)

let todosInProgress = todos.where {
    $0.status == "InProgress"
}
print("A list of all todos in progress: \(todosInProgress)")

// All modifications to a realm must happen in a write block.
let todoToUpdate = todos[0]
try! realm.write {
    todoToUpdate.status = "InProgress"
}

// All modifications to a realm must happen in a write block.
let todoToDelete = todos[0]
try! realm.write {
    // Delete the Todo.
    realm.delete(todoToDelete)
}

// Retain notificationToken as long as you want to observe
let notificationToken = todos.observe { (changes) in
    switch changes {
    case .initial: break
        // Results are now populated and can be accessed without blocking the UI
    case .update(_, let deletions, let insertions, let modifications):
        // Query results have changed.
        print("Deleted indices: ", deletions)
        print("Inserted indices: ", insertions)
        print("Modified modifications: ", modifications)
    case .error(let error):
        // An error occurred while opening the Realm file on the background worker thread
        fatalError("\(error)")
    }
}

// Invalidate notification tokens when done observing
notificationToken.invalidate()