如何让moving_avg移动平均函计算时包括数据值为0的日期

代码如下，先聚合了每天的日期，然后再用移动平均计算了7天的平均值

{

  "size": 0,

  "aggs": {

    "my_date_histo": {

      "date_histogram": {

        "field": "created_at",

        "interval": "day"

      },

      "aggs": {

        "the_count": {

          "value_count": {

            "field": "id"

          }

        },

        "the_movavg":{

          "moving_avg": {

            "buckets_path": "the_count",

            "window":7

          }

        }

      }

    }

  }

}

这个时候，因为10月2日和3日没有数据，所以the_count那一项是0，但是the_movavg那一项也是0，如何让这个函数也计算带0的数据

{

  "key_as_string" : "2019-09-30T00:00:00.000Z",

  "key" : 1569801600000,

  "doc_count" : 20,

  "the_count" : {

    "value" : 20

  },

  "the_movavg" : {

    "value" : 35.857142857142854

  }

},

{

  "key_as_string" : "2019-10-01T00:00:00.000Z",

  "key" : 1569888000000,

  "doc_count" : 6,

  "the_count" : {

    "value" : 6

  },

  "the_movavg" : {

    "value" : 31.857142857142858

  }

},

{

  "key_as_string" : "2019-10-02T00:00:00.000Z",

  "key" : 1569974400000,

  "doc_count" : 0,

  "the_count" : {

    "value" : 0

  }

},

{

  "key_as_string" : "2019-10-03T00:00:00.000Z",

  "key" : 1570060800000,

  "doc_count" : 0,

  "the_count" : {

    "value" : 0

  }

},

{

  "key_as_string" : "2019-10-04T00:00:00.000Z",

  "key" : 1570147200000,

  "doc_count" : 34,

  "the_count" : {

    "value" : 34

  },

  "the_movavg" : {

    "value" : 25.857142857142858

  }

},