基类属性未写给MongoDB

Question

使用play 2/scala，casbah和salat

abstract class BaseQuestion(val data:String,val responses:List[StudentResponse] = Nil){
  val key:String = UUID.randomUUID().toString
}
case class Question(override val data:String, val questionType:String = "MCQ", val choices:List[String] = Nil,
                    val answer:String,override val responses:List[StudentResponse])
  extends BaseQuestion(data = data,responses = responses)

但是，当我使用salatdao.save时，检查mongo数据库属性密钥未存储在mongo数据库对象中。

不确定问题是什么。

预先感谢您。

Answer 1

您需要用@Persist

注释属性key

https://github.com/novus/salat/wiki/annotations