Slick:返回带有自动增量ID的插入行

Question

我正在尝试插入MySQL表并返回具有自动增量ID的行.我的代码如下:

private val Log = TableQuery[GCMLogTable]

def save(log: GCMLog): Try[GCMLog] = Try {
    val newId = (Log returning Log.map(_.id)) += log
    log.copy(id = newId)
}

但是我的代码编译失败,出现以下错误:

type mismatch;
    found   : slick.profile.FixedSqlAction[Long,slick.dbio.NoStream,slick.dbio.Effect.Write]
    required: Long

也试过了

def save(log: GCMLog): Try[GCMLog] = Try {
    (Log returning Log.map(_.id)
      into ((log, newId) => log.copy(id = newId))
      ) += log
}

但仍然失败了

type mismatch;
found   : slick.profile.FixedSqlAction[models.GCMLog,slick.dbio.NoStream,slick.dbio.Effect.Write]
required: models.GCMLog

[我在这里提到了SO问题如何捕获重复键值违规的光滑postgres异常和Slick文档http://slick.typesafe.com/doc/3.1.1/queries.html ]

非常感谢,如果有人能告诉我发生了什么以及如何解决这个问题.

谢谢!

Answer 1

 def save(log: GCMLog): Try[GCMLog] = Try {
    (Log returning Log.map(_.id))
       into ((log, newId) => log.copy(id = newId))
        ) += log
  }

更新：

看起来db.run需要执行才能将其转换Action为结果。