Question

我试图将产品插入我的数据库，但事实上我什么都没插入

我的模型看起来像：

case class Product(id: Option[Int], name: String, description: String,  style: String, price: Int, cat_id: Int, size_id: Int, brand_id: Int)

表格定义：

class ProductsTable(tag: Tag) extends Table[Product](tag, "PRODUCTS") {
  def id = column[Int]("PRODUCT_ID", O.PrimaryKey, O.AutoInc)
  def title = column[String]("NAME")
  def description = column[String]("DESCRIPTION")
  def style = column[String]("STYLE")
  def price = column[Int]("PRICE")
  def category_id = column[Int]("CATEGORY_ID")
  def size_id = column[Int]("SIZE_ID")
  def brand_id = column[Int]("BRAND_ID")
  def category = foreignKey("CAT_FK", category_id, cat.Categories)(_.cat_id, onUpdate=ForeignKeyAction.NoAction, onDelete=ForeignKeyAction.Cascade)
  def size = foreignKey("SIZE_FK", size_id, sizes.Sizes)(_.size_id, onUpdate=ForeignKeyAction.NoAction, onDelete=ForeignKeyAction.Cascade)
  def brand = foreignKey("BRAND_FK", brand_id, brands.Brands)(_.brand_id, onUpdate=ForeignKeyAction.NoAction, onDelete=ForeignKeyAction.Cascade)
  def * = (id.?, title, description, style, price, category_id, size_id, brand_id) <>(Product.tupled, Product.unapply _)
}

在DAO中插入方法：

def insert(product: Product): Future[Unit] = db.run(Products += product).map { _ => () }

和控制器：

def newproduct = Action { implicit request =>
  val product: models.Product = productForm.bindFromRequest().get
  productDAO.insert(product)
  Redirect(routes.ProductController.listproducts())
}

Answer 1

您对从productDAO返回的未来做了什么？由于这是异步调用，因此您启动的线程不会发生任何事情。你必须对未来采取行动，找出发生了什么。如果您的网络库是异步的，您应该能够像这样完成：

def newproduct = Action { implicit request =>
  val product: models.Product = productForm.bindFromRequest().get
  productDAO.insert(product).andThen {
    case Success(_) =>
      Redirect(routes.ProductController.listproducts())
    case Failure(e) =>
      log.error(e) // some logging
      Failure(500) // some failure
  }
}

如果您的网络库不是异步，您可能需要等待答案：

def newproduct = Action { implicit request =>
  val product: models.Product = productForm.bindFromRequest().get
  import scala.concurrent.duration._
  Try(Await.result(productDAO.insert(product), 10 seconds)) match {
    case Success(_) =>
      Redirect(routes.ProductController.listproducts())
    case Failure(e) =>
      log.error(e) // some logging
      Failure(500) // some failure
  }
}

光滑不插入但没有错误

1 个答案: