以嵌套形式将案例类应用于单个字段Scala Play

Question

我正在尝试将案例类应用于 Scala Play 表单中的单个字段。我尝试将其应用到的字段是 exerciseName 在 setsForm 变量内。

  case class ExerciseName(exerciseName:String)
  case class WorkoutSet(exerciseName:ExerciseName, number:Int)
  case class WorkoutSets(sets:List[WorkoutSet]) 
  val setsForm:Form[WorkoutSets] = Form( 
    mapping( 
      "workoutSets" -> list(mapping
      (   
        //i need to get exerciseName to be of type ExerciseName somehow...
        "exerciseName" ->nonEmptyText,  
        "workoutSet" -> number(min=1,max=20)
        )(WorkoutSet.apply)(WorkoutSet.unapply))
    )(WorkoutSets.apply)(WorkoutSets.unapply)
  )

我想知道是否有人可以就此提供任何见解。

谢谢！

Answer 1

val setsForm:Form[WorkoutSets] = Form(
    mapping(
      "sets" -> list(
        mapping(
          "exerciseName" -> mapping("exerciseName" -> nonEmptyText)(ExerciseName.apply)    (ExerciseName.unapply),
          "workoutSet" -> number(min=1,max=20)
        )(WorkoutSet.apply)(WorkoutSet.unapply)
      )
    )(WorkoutSets.apply)(WorkoutSets.unapply)
)

我还建议将练习名称的字段名称更改为“名称”以避免混淆。