scala – 更好的光滑动态查询编码风格

private def buildQuery(query: TweetQuery) = {
      var q = Tweets.map { t =>
        t
      }
      query.isLocked.foreach { isLocked =>
        q = q.filter(_.isLocked === isLocked)
      }
      query.isProcessed.foreach { isProcessed =>
        q = q.filter(_.processFinished === isProcessed)
      }
      query.maxScheduleAt.foreach { maxScheduleAt =>
        q = q.filter(_.expectScheduleAt < maxScheduleAt)
      }
      query.minScheduleAt.foreach { minScheduleAt =>
        q = q.filter(_.expectScheduleAt > minScheduleAt)
      }
      query.status.foreach { status =>
        q = q.filter(_.status === status)
      }
      query.scheduleType.foreach { scheduleType =>
        q = q.filter(_.scheduleType === scheduleType)
      }
      q
    }

我正在写上面的内容来做动态查询.真无聊,还有什么方法可以做到这一点？

解决方法

也许MaybeFilter可以帮助你 https://gist.github.com/cvogt/9193220