播放框架-将主动脉与Option [LocalDate] \\ Option [LocalDateTime]结合使用

Question

I am trying to define a nullable date field in postgres, while using anorm as connection to the database.

I am trying to update an entry:

def update(id: Long, startTime: Option[LocalDate]){
   SQL("""UPDATE my_table
        |SET start_date = {start_date}
        |WHERE id = {id}
      """.stripMargin)
      .on(
        'id ->id,
        'start_date -> startDate,
      ).executeUpdate()
 }

But I get a compilation error, looks like anorm can't handle Option[DateTime], although when I configured a parser it works form me:

val parser: RowParser[Info] = {
  get[Long]("id") ~
  get[Option[DateTime]]("start_date") map {
  case id ~ startTime => Info(id, startDate)
}

}

What am I missing here? Thanks!

Answer 1

I added my own implicit definitions:

implicit def rowToLocalDate: Column[LocalDate] = Column.nonNull {(value, meta) =>
   val MetaDataItem(qualified, nullable, clazz) = meta
   value match {
      case ts: java.sql.Timestamp => Right(new LocalDate(ts.getTime))
      case d: java.sql.Date => Right(new LocalDate(d.getTime))
      case str: java.lang.String => Right(fmt.parseLocalDate(str))
      case _ => Left(TypeDoesNotMatch("Cannot convert " + value + ":" + value.asInstanceOf[AnyRef].getClass) )
}

}

implicit val localDateToStatement = new ToStatement[LocalDate] {
    def set(s: java.sql.PreparedStatement, index: Int, aValue: LocalDate): Unit = {
       s.setTimestamp(index, new java.sql.Timestamp(aValue.toDateTimeAtStartOfDay().getMillis()))
}

}

And the relevant ParameterMetaData

implicit object LocalDateClassMetaData extends  ParameterMetaData[LocalDate] {
   val sqlType = ParameterMetaData.DateParameterMetaData.sqlType
   val jdbcType = ParameterMetaData.DateParameterMetaData.jdbcType
}

That made the trick

Answer 2

相关问题， 通过Java.time LocalDateTime进行Anorm比较/搜索，它对我有用的只是更新到新版本（尚未发行一个）