ElasticSearch 根据 restaurant_id 及其平均时间显示数据

Question

我是ElasticSearch的新手，想知道是否可以根据restaurant_id显示数据，然后是确认订单的平均时间。例如，我有文件：

{ _index: "orders-development",
_type: "order",
_id: "4412917",
_score: 1,
_source: {confirm_duration: 5}
}

{ _index: "orders-development",
_type: "order",
_id: "4412917",
_score: 1,
_source: {confirm_duration: 4}
}

{ _index: "orders-development",
_type: "order",
_id: "4322923",
_score: 1,
_source: { confirm_duration: 12}
}

以上是存储在ES中的文件，现在我要根据restaurant_id显示数据，然后是平均时间。所以现在我使用下面的代码并显示错误 "reason":"[terms] unknown field [avg], parser not found"

aggregations = {
  avg_order_confirmation: {
    terms: {
      field: :restaurant_id,
      size: 100,
      avg: { field: :confirm_duration },
    }
  }
}

Answer 1

您快到了，您需要将avg 移动到terms 的子聚合：

aggregations = {
  avg_order_confirmation: {
    terms: {
      field: :restaurant_id,
      size: 100
    },
    aggs: {
      avg_confirmation: {
        avg: { field: :confirm_duration }
      }
    }
  }
}