search - 获取总和子聚合

Question

我想获得子聚合的总和。例如，我按智能手机分组，按运营商分组，然后是该运营商的平均价格。我想获得特定智能手机所有运营商的所有价格总和。所以基本上，我想要这样的东西:

{
  "aggs": {
    "group_by_smartphones": {
      "terms": {
        "field": "smartphone",
        "order": {
          "_term": "asc"
        },
        "size": 200
      },
      "aggs": {
        "group_by_sum": {
          "sum": {
            "field": "price"
          },
          "aggs": {
            "group_by_carrier": {
              "terms": {
                "field": "carrier",
                "order": {
                  "group_by_avg": "desc"
                }
              },
              "aggs": {
                "group_by_avg": {
                  "avg": {
                    "field": "price"
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

除了，当我这样做时，我得到这个错误:

"type": "aggregation_initialization_exception", "reason": "Aggregator [group_by_sum] of type [sum] cannot accept sub-aggregations"

我该如何解决才能获得每部智能手机所有价格的总和？

Answer 1

你快到了，实际上 sum 和 group_by_carrier 子聚合都需要处于同一级别:

{
  "aggs": {
    "group_by_smartphones": {
      "terms": {
        "field": "smartphone",
        "order": {
          "_term": "asc"
        },
        "size": 200
      },
      "aggs": {
        "sum_prices": {
          "sum": {
            "field": "price"
          }
        },
        "group_by_carrier": {
          "terms": {
            "field": "carrier",
            "order": {
              "group_by_avg": "desc"
            }
          },
          "aggs": {
            "group_by_avg": {
              "avg": {
                "field": "price"
              }
            }
          }
        }
      }
    }
  }
}