光滑连接功能输入

Question

如何使用该功能的输入并加入光滑的

例如

def query (coffeID : int) = DBAction { implicit rs =>
val implicitInnerJoin = for {
      c <- coffees
      s <- suppliers if ((c.supID === s.id ) && (c.cofID === coffeeID))
  } yield (c.name, s.name)

- 使用====

编辑拼写错误

Answer 1

您需要使用===

def query (coffeID : int) = DBAction { implicit rs =>
    val query = for {
        c <- coffees
        s <- suppliers if (c.supID === s.id) && (c.cofID === coffeeID)
    } yield (c.name, s.name)
    query.list
}