Scala类型不匹配：找到Future [MyType]需要Future [Option [MyType]]

Question

我从API获得Future[MyType]。如何将Future[MyType]转换为Future[Option[MyType]]？

def getApiKey(id: String): Future[Option[MyType]] = Future {
  val g: Future[Option[MyType]] = getID(id) // error mismatch
  g
}

def getID(id: String): Future[MyType] = {
  //return Future[MyType]
}

Answer 1

使用map：

def getApiKey(id: String): Future[Option[MyType]] = {
  getID(id).map(Option(_))
}