[英]How to save struct to Realm, with list of another struct
我根据本指南在结构中创建了数据持久层,但我还需要使用结构创建一些领域对象并将其添加到结构中的另一个领域对象,如数组。 我的意思是这样的:
public struct Publisher {
public let identifier: Int
public let name: String
}
public struct Character {
public let identifier: Int
public let name: String
public let realName: String
var publisherArray: [Publisher]
}
final class PublisherObject: Object {
dynamic var identifier = 0
dynamic var name = ""
override static func primaryKey() -> String? {
return "identifier"
}
}
final class CharacterObject: Object {
dynamic var identifier = 0
dynamic var name = ""
dynamic var realName = ""
var publisherArray: List<PublisherObject>?
override static func primaryKey() -> String? {
return "identifier"
}
}
在上面的指南中,作者只添加了另一个结构体,而不是数组。 我到了这一点:
extension Character: Persistable {
public init(managedObject: CharacterObject) {
identifier = managedObject.identifier
name = managedObject.name
realName = managedObject.realName
publisherArray = managedObject.publisherArray
.compactMap(Publisher.init(managedObject:))
}
}
但我不知道,我必须在这里输入什么:
public func managedObject() -> CharacterObject {
let character = CharacterObject()
character.identifier = identifier
character.name = name
character.realName = realName
// here must be something like that, but for array
// character.publisherArray = publisherArray.managedObject()
return character
}
谢谢大家的帮助:-)
我终于解决了我的问题:-)
public func managedObject() -> CharacterObject {
let character = CharacterObject()
character.identifier = identifier
character.name = name
character.realName = realName
publisherArray.forEach({ publisher in
character.publisherArray.append(publisher.managedObject())
})
return character
}
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