update を普通に実装した場合

update.scala

case class Coffees(id: Int, name: String, supId:Int, price: Double)

class CoffeesTable(tag: Tag) extends Table[(String, Int, Double, Int, Int)](tag, "coffees") {
  def id = column[Int]("COF_NAME", O.PrimaryKey)
  def name = column[String]("name")
  def supID = column[Int]("SUP_ID")
  def price = column[Double]("PRICE")
  def * = (id, name, supID, price) <> (Coffees.tupled, Coffees.unapply)
  // A reified foreign key relation that can be navigated to create a join
}

val query = TableQuery[Coffees]

def update (coffee: Coffees) = {
  Database.forURL("jdbc:h2:mem:test1", driver = "org.h2.Driver") withSession {
    implicit session =>
    query.filter(id===coffee.id).update(coffee)
  }
}

def main(args: Array[String]) {
  update(coffee(1,"starbacks",1,540))
}