相关疑难解决方法(0)

我有这样的插入方法（权重为索引）

implicit def run[A](action: DBIOAction[A, NoStream, _ <: slick.dbio.Effect]): Future[A] = {
    db.run(action)
  }

def insert(newCategory: CategoryExtractor): Future[Either[String, CategoryResponse]] = {
        category.map(_.weight).max.result.flatMap {
          case Some(weight) =>
            val temp = newCategory.copy(weight = weight+1)
            (category += temp).andThen(DBIO.successful(Right(toCategoryExtractor(temp))))
          case None =>
            val temp = newCategory.copy(weight = 1)
            (category += temp).andThen(DBIO.successful(Right(toCategoryExtractor(temp))))
        }
  }

我叫它两次

insert(CategoryExtractor("1", "name", "scala every where", 0, 0, 0, None)) onComplete {
    case Success(data) => println(data)
  }

insert(CategoryExtractor("2", "name", "haskell every where", 0, 0, 0, None)) onComplete {
    case Success(data) => …