為不存在的表slick scala（Slick 3.0.0，scala）創建類表

Question

假設我們有一個數據庫，其中包含兩個表： Coffee和Suppliers ，並且具有相應的案例類和表，就像在文檔中一樣：

import scala.slick.driver.MySQLDriver.simple._
import scala.slick.lifted.{ProvenShape, ForeignKeyQuery}


// A Suppliers table with 6 columns: id, name, street, city, state, zip
class Suppliers(tag: Tag) extends Table[(Int, String, String, String, String, String)](tag, "SUPPLIERS") {
  def id: Column[Int] = column[Int]("SUP_ID", O.PrimaryKey) // This is the primary key column
  def name: Column[String] = column[String]("SUP_NAME")
  def street: Column[String] = column[String]("STREET")
  def city: Column[String] = column[String]("CITY")
  def state: Column[String] = column[String]("STATE")
  def zip: Column[String] = column[String]("ZIP")

  // Every table needs a * projection with the same type as the table's type parameter
  def * : ProvenShape[(Int, String, String, String, String, String)] = (id, name, street, city, state, zip)
}

// A Coffees table with 5 columns: name, supplier id, price, sales, total
class Coffees(tag: Tag) extends Table[(String, Int, Double, Int, Int)](tag, "COFFEES") {
  def name: Column[String] = column[String]("COF_NAME", O.PrimaryKey)
  def supID: Column[Int] = column[Int]("SUP_ID")
  def price: Column[Double] = column[Double]("PRICE")
  def sales: Column[Int] = column[Int]("SALES")
  def total: Column[Int] = column[Int]("TOTAL")

  def * : ProvenShape[(String, Int, Double, Int, Int)] = (name, supID, price, sales, total)

  // A reified foreign key relation that can be navigated to create a join
  def supplier: ForeignKeyQuery[Suppliers, (Int, String, String, String, String, String)] = 
    foreignKey("SUP_FK", supID, TableQuery[Suppliers])(_.id)
}

現在假設我們要進行聯接：

   val result = for {
       c <- coffees
       s <- suppliers if c.supID === s.id
} yield (c.name, s.name)

在這里處理結果很復雜（如果有很多聯接，它也會更復雜），因為我們需要始終記住名稱的順序，知道_._1或_._2引用...等。

問題1是否可以更改結果的類型，使其成為包含所需列的新類的表？

問題2這是一種方法，但我無法完成，例如，我們構造一個case類：

case class Joined(nameS: String,nameC: String)

然后我們構造相應的表，我不知道如何

class Joineds extends Table[Joinedclass] {
//Todo
}

當我們編寫聯接時，我們可以寫類似的東西（以便我們可以將結果轉換為Joined類型）：

   val result = for {
       c <- coffees
       s <- suppliers if c.supID === s.id
} yield (c.name, s.name).as(Joinds)

謝謝。

Answer 1

您可以像這樣定義它嗎：

val result = for {
  c <- coffees
  s <- suppliers if c.supID === s.id
} yield Joined(c.name, s.name)

並把它塞進一些方便的地方？