Scala在數據庫中創建表格

我正在構建一個ScalaFX應用程序，並希望將Slick添加爲我的數據庫框架。我對它很陌生，正試圖用Slick來配置我的應用程序。我正在一步一步跟蹤在線教程。但是，當我執行db.run（）時，我的表永遠不會被創建。我試圖運行普通的SQL查詢，並且工作，所以它不是不連接。它運行得很好，只是返回「咖啡：」這是我的代碼。提前致謝！Scala在數據庫中創建表格

import scala.concurrent.{Future, Await} 
import scala.concurrent.ExecutionContext.Implicits.global 
import scala.concurrent.duration.Duration 
import slick.backend.DatabasePublisher 
import slick.driver.MySQLDriver.api._ 
import scala.slick.jdbc.{StaticQuery => Q} 
import scala.concurrent.{Future, Await} 
// The main application 
object CustomerQueries extends App { 
    val db = Database.forURL("jdbc:mysql://localhost:3306/business", driver="com.mysql.jdbc.Driver", 
    user="pslagle12", password="pfSlagle12") 
    val coffees = TableQuery[Coffees] 
    val suppliers = TableQuery[Suppliers] 
    //Q.updateNA("CREATE TABLE `company_name`").execute 
     val customers = TableQuery[Customers] 
    db.withSession {implicit session => 
    val setup = DBIO.seq(
     (suppliers.schema ++ coffees.schema).create, 
suppliers += (101, "Acme, Inc.",  "99 Market Street", "Groundsville", "CA", "95199"), 
     suppliers += (49, "Superior Coffee", "1 Party Place", "Mendocino", "CA", "95460"), 
     suppliers += (150, "The High Ground", "100 Coffee Lane", "Meadows",  "CA", "93966"), 
     // Equivalent SQL code: 
     // insert into SUPPLIERS(SUP_ID, SUP_NAME, STREET, CITY, STATE, ZIP) values (?,?,?,?,?,?) 
     coffees ++= Seq(
     ("Colombian",   101, 7.99, 0, 0), 
     ("French_Roast",  49, 8.99, 0, 0), 
     ("Espresso",   150, 9.99, 0, 0), 
     ("Colombian_Decaf", 101, 8.99, 0, 0), 
     ("French_Roast_Decaf", 49, 9.99, 0, 0) 
      ) 
    ) 
    val setupFuture = db.run(setup) 
    // Read all coffees and print them to the console 
    println("Coffees:") 
    db.run(coffees.result).map(_.foreach { 
     case (name, supID, price, sales, total) => 
     println(" " + name + "\t" + supID + "\t" + price + "\t" + sales + "\t" + total) 
    }) 
    // Equivalent SQL code: 
    // select COF_NAME, SUP_ID, PRICE, SALES, TOTAL from COFFEES 

    } 
class Suppliers(tag: Tag) extends Table[(Int, String, String, String, String, String)](tag, "SUPPLIERS") { 
    def id = column[Int]("SUP_ID", O.PrimaryKey) // This is the primary key column 
    def name = column[String]("SUP_NAME") 
    def street = column[String]("STREET") 
    def city = column[String]("CITY") 
    def state = column[String]("STATE") 
    def zip = column[String]("ZIP") 
    // Every table needs a * projection with the same type as the table's type parameter 
    def * = (id, name, street, city, state, zip) 
    } 


    // Definition of the COFFEES table 
    class Coffees(tag: Tag) extends Table[(String, Int, Double, Int, Int)](tag, "COFFEES") { 
    def name = column[String]("COF_NAME", O.PrimaryKey) 
    def supID = column[Int]("SUP_ID") 
    def price = column[Double]("PRICE") 
    def sales = column[Int]("SALES") 
    def total = column[Int]("TOTAL") 

def * = (name, supID, price, sales, total) 
    // A reified foreign key relation that can be navigated to create a join 
    def supplier = foreignKey("SUP_FK", supID, suppliers)(_.id) 
    } 

}

來源

2016-05-06 Patrick S.

'db.run'返回'Future'。嘗試使用'scala.concurrent.Await'來阻塞，直到它完成運行。 – jkinkead

感謝您的幫助！ –

爲了確保設置查詢完成後的結果查詢運行，您應該運行這兩個動作組合：

val resultFuture = db.run(setup >> coffees.result)

然後，像jkinkead建議，等待未來完成，如果你想要打印結果：

Await.result(resultFuture, 10 seconds)

來源

2016-05-09 10:58:56 devkat

Scala在數據庫中創建表格

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