嗨，我正在与Realm合作，我正在尝试获取和输出以下内容：
Fido has 1 owners (["John"])
Rex has 2 owners (["Mary","Bob"])
尽管我不断获得以下输出：
Fido has 1 owners (["John"])
Rex has 1 owners (["Mary"])
Rex has 1 owners (["Bob"])
这是我正在使用的代码：
// this in the app delegate
try! realm.write {
realm.create(Person.self, value: ["John", [["Fido", 1]]])
realm.create(Person.self, value: ["Mary", [["Rex", 2]]])
realm.create(Person.self, value: ["Bob", [["Rex", 2]]])
}
// Log all dogs and their owners using the "owners" inverse relationship
let allDogs = realm.objects(Dog)
for dog in allDogs {
let ownerNames = dog.owners.map { $0.name }
print("\(dog.name) has \(ownerNames.count) owners (\(ownerNames))")
}
class Dog: Object {
dynamic var name = ""
dynamic var age = 0
var owners: [Person] {
// Realm doesn't persist this property because it only has a getter defined
// Define "owners" as the inverse relationship to Person.dogs
return linkingObjects(Person.self, forProperty: "dogs")
}
}
class Person: Object {
dynamic var name = ""
let dogs = List<Dog>()
}
谢谢您的帮助。
从外观上看Rex，每次向数据库添加新所有者时，您都在创建一个完全独立的副本，而不是重复使用同一副本。
最好Dog事先单独创建对象，然后在创建对象时直接引用这些Person对象。
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