小编Cod*_*cPM的帖子

在我的项目中，我有一个废物收集，如下所示

wastes:[
        {weight: 100, date: ISODate("2016-01-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-01-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-02-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-02-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-03-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-03-01T10:20:41.417Z")}
        ........................................................
        {weight: 100, date: ISODate("2016-12-01T10:20:41.417Z")}
        {weight: 100, date: ISODate("2016-12-01T10:20:41.417Z")}
       ]

我想在今年的每个月明智地汇总浪费，例如

results: [
          <month1>:{weight: 200},
          <month2>:{weight: 200},
          ......................
          <month12>:{weight: 200} 
]

以及当月的周明智和当前周的逐日如下

results:[
        <week1>:{weight: 100},
        .....................
        <week4>:{weight: 100}
        ]

results: [
          <day1>:{weight: 100},
          ....................
          <day7>:{weight: 100}
         ]

注意：每周和每天的聚合值只是我需要那种输出的虚拟值。