如何计算mongodb中的时间戳差异(以小时为单位)?

问题描述:

这是我的数据:

[
   {
       id: 1, 
       starttime: ISODate("2015-08-24T00:00:00.000Z"), 
       endtime: ISODate("2015-08-24T07:00:00.000Z")
   },
   {
       id: 2, 
       starttime: ISODate("2015-08-24T20:00:00.000Z"), 
       endtime: ISODate("2015-08-25T01:00:00.000Z")
   }
]

我可以进行mongodb查询以显示开始时间和结束时间的持续时间(在这种情况下为差异操作),结果如下:

can I make a mongodb query to display duration (or in this case a difference operation) of starttime and endtime with results like:

[ {id:1, duration: 7}, {id: 2, duration: 5}]

请注意,时间戳记可以具有不同的日期,因此$hour(聚合管道)可能不起作用.有人可以帮忙吗?谢谢

Notice that timestamp can have different date so $hour(aggregation pipeline) might not work. Can anyone help ? Thank you

db.collectionname.aggregate([
  {$project: {
      duration: {$divide: [{$subtract: ["$endtime", "$starttime"]}, 3600000]}
  }}
])