如何使用 ID 列表过滤 TableQuery？

Question

我真的是 Slick 和 Scala 的新手，我正在努力使用 id 列表过滤查询。

productsNeededIds // = "1,2,3,4,5" - list of Ids of products

问题：如何使用 .filter 从拆分列表中获取包含所有 id 的查询？

   def productsWithIds(productsNeededIds: String)(implicit ec: ExecutionContext): Future[List[ProductsREST]] = {

    var splitedArray :Array[String] = productsNeededIds.split(",")
    val query = Products.filter(_.prodId === splitedArray)// what should be here instead of ===splitedArray?
}

Answer 1

You should use the inSet method:

def productsWithIds(productsNeededIds: String)(implicit ec: ExecutionContext): Future[List[ProductsREST]] = {

  val splitedSet: Set[String] = productsNeededIds.split(",").toSet
  val query = Products.filter(_.prodId.inSet(splitedSet))
}

That's assuming your product IDs are strings. If they're Ints instead, you should map your splittedSet to Ints first, of course.