我有以下光滑的动作,该动作更新了2016年的所有日期,不包括星期六和周日
val action = dates.filter( d => d.year === 2016 &&
d.weekDay != "Sat" && d.weekDay != "Sun").map(x => (x.isHoliday)).update(0)
Await.result(db.run(action), Duration.Inf).value
val sql = action.statements.head
println(sql)
问题是该更新无法按预期工作,SQL PRINTS
update `dates` set `is_holiday` = ? where ((`dates`.`year` = 2016) and true) and true
何时应该打印
update `dates` set `is_holiday` = ? where `dates`.`year` = 2016
and `dates`.`week_day` != 'Sat' and `dates`.`week_day` != 'Sun'
此语句有什么问题?
我相信您是在意外使用Scala !=
操作员而不是光滑的=!=
函数。尝试以下操作:
val action = dates.filter(d => d.year === 2016 && d.weekDay =!= "Sat" && d.weekDay =!= "Sun").map(x => (x.isHoliday)).update(0)
您也可以尝试以下方法:
val weekendDays = Set("Sat", "Sun")
val action = dates.filter(d => d.year === 2016 && !d.weekDay.inSet(weekendDays))