Question

所以我对领域来说还很陌生，我觉得我的问题很基础，但是我找不到答案。

基本上，我正在尝试查询与特定playerName关联的所有TeamID的Realm（即TeamID不是主键），但是我很难找到解决方案。我不断收到Value of type 'Results<playerInfoTable>' has no member 'playerName'错误。

下面是我的境界类：
`class playerInfoTable：对象{

@objc dynamic var playerID: Int = 0
@objc dynamic var playerName: String = ""
@objc dynamic var jerseyNum: Int = 0
@objc dynamic var TeamID: String = ""
@objc dynamic var goalCount: Int = 0
@objc dynamic var shotCount: Int = 0

override class func primaryKey() -> String {
    return "playerID"
}

}`

和代码我使用的查询领域：

let mainPlayerFilter = NSPredicate(format: "teamID == %@", "1")
let mainPlayerStrings = realm.objects(playerInfoTable.self).filter(mainPlayerFilter)
let mainPlayerTeamName = mainPlayerStrings.playerName

解决方案！

let mainPlayerFilter = NSPredicate(format: "TeamID == %@", String(homeTeam!))
let mainPlayerStrings = realm.objects(playerInfoTable.self).filter(mainPlayerFilter)
let mainPlayerTeamName = mainPlayerStrings.value(forKeyPath: "playerName") as! [String]

Answer 1

我想，当你声明mainPlayerTeamName常数你的错误。请尝试以下操作：

let mainPlayerTeamName = mainPlayerStrings.first?.playerName

我注意到在您的playerInfoTable类中，您将“ teamID”声明为“ TeamID”，而在您的谓词中，您将其称为“ teamID”。确定您要哪个，因为NSPredicate默认情况下区分大小写。

使用Realm Swift从过滤查询中获取关联的对象值

1 个答案: