基于 DateTime Dataweave 过滤负载

如何解决基于 DateTime Dataweave 过滤负载

我有这个示例有效负载，我想根据日期时间值对其进行过滤：

[
    {
        "title" : "Article 1","createdDateTime": "2021-04-04T18:41:00"
    },{
        "title" : "Article 2","createdDateTime": "2021-04-04T18:49:00"
    },{
        "title" : "Article 3","createdDateTime": "2021-04-04T18:55:00"
    }
]

我只想要 15 分钟前创建的文章，例如 datetime 现在是“2021-04-04T19:00:00”，我应该只得到第 2 条和第 3 条。尝试了这个表达式但没有用:

%dw 2.0
output application/json
---
payload filter ((value) -> (value.createdDateTime as: datetime{"yyyy-MM-ddTHH:mm:ss"}  <= Now()-|PT15M|))

有没有更好的方法来做到这一点？谢谢！

解决方法

此解决方案使用一个函数来接收列表、时间戳（您可以使用 now()）和一个句点。

%dw 2.0
output application/json
fun filterPeriod(list,time,period) =
    payload filter ((value) -> (time - (value.createdDateTime 
        as LocalDateTime { format: "yyyy-MM-dd'T'HH:mm:ss"}))  as Number {unit: "milliseconds"} <= period  as Number {unit: "milliseconds"}  )
---
filterPeriod(payload,|2021-04-04T19:00:00|,|PT15M|)

输出：

[
  {
    "title": "Article 2","createdDateTime": "2021-04-04T18:49:00"
  },{
    "title": "Article 3","createdDateTime": "2021-04-04T18:55:00"
  }
]
``'