相关疑难解决方法(0)

我的问题很简单.

我有一列seqNum: Double是NOT NULL DEFAULT 1在CREATE TABLE声明如下:

CREATE TABLE some_table
(
    ...
    seq_num DECIMAL(18,10) NOT NULL DEFAULT 1,
    ...
);

用户可以seqNum在UI中输入或不输入值.所以接受PLAY形式如下:

case class SomeCaseClass(..., seqNum: Option[Double], ...)
val secForm = Form(mapping(
    ...
    "seqNum" -> optional(of[Double]),
    ...
  )(SomeCaseClass.apply)(SomeCaseClass.unapply))

光滑的Table Schema&Objects看起来像这样:

case class SomeSection (
   ...
   seqNum: Option[Double],
   ...
)
class SomeSections(tag: Tag) extends Table[SomeSection](tag, "some_table") {
  def * = (
      ...
      seqNum.?,
      ...
    ) <> (SomeSection.tupled, SomeSection.unapply _)

  ...
  def seqNum …