光滑3交易怎么样

时间:2015-11-21 12:51:12

标签: scala playframework slick

试图将头围绕在光滑的3 api上。

我有这些方法签名:

  def findById(id: Long): DBIO[Option[Project]] =
Projects.filter(_.id === id).result.headOption

  def insert(Task: Task): DBIO[Long] =
Tasks returning Tasks.map(_.id) += Task

我希望在我的控制器中的单个事务中运行。

我的代码目前看起来像这样并且不是交易代码:

def addTaskToProject(taskName: String, projectId: Long) = Action.async { implicit rs =>

  val query = for {
    Some(project) <-  projectDAO.findById(projectId)
    id <- taskDAO.insert(Task(0, "blue", project.id))
  }yield id

  val result = dbConfig.db.run(query)

  result.map{ taskId =>
    Ok("I have created a new task: " + taskId)
  }
}

1)我试过这样做:

val result = dbConfig.db.run(query).transactionally

但这给了我这个错误:

... value transactionally is not a member of scala.concurrent.Future[Long]

2)然后我尝试了这个:

val result = dbConfig.db.run(query.transactionally)

并收到此错误:

... value transactionally is not a member of slick.dbio.DBIOAction[Long,slick.dbio.NoStream,slick.dbio.Effect.All with slick.dbio.Effect.All]

我怎样才能运行这个简单的例子?

1 个答案:

答案 0 :(得分:4)

事务性是DBIO的功能, 试试这个:

val result = dbConfig.db.run(query.transactionally)

P.S。实际上存在从DBIOActionJdbcActionExtensionMethods的隐式转换,其具有transactionally函数