前N个结果的聚合 [英] Aggregation on top N results

问题描述

问题：

如果我搜索iphone，我得到400个产品结果和产品类别聚合我已经返回前3

If I search for "iphone" I get 400 product results and the product category aggregation I have returns the top 3 categories in the results set.

这些类别包括智能手机，手机套和手机配件。

Those categories would include smartphones, phone cases and mobile phone accessories.

如果我搜索iphone 6我得到1400结果，因为额外的6返回匹配更多的产品。产品类别聚合现在返回所有这些结果的前3个类别。

If I search "iphone 6" I get 1400 results because of the extra "6" returns matches to more products. The product category aggregation now returns the top 3 categories for all those results.

目前，前3个产品类别将从电缆到计算机显示器都是一切。

The top 3 product categories will now be everything from cables to computer monitors.

我需要做的是获得前100名成绩的前3名。

What I need to do is get the top 3 categories for the top 100 results.

我尝试过的

我尝试使用 top_hits 顶级类别聚合中的聚合，但只返回每个类别中的顶级产品。

I've tried using the top_hits aggregation within the top category aggregation but that only returns the top products in each category.

像这样：

{
    "aggs": {

        "product_categories": {
            "terms": {
                "field": "product_category",
                "size": 10,
            }
        }        
        "aggs": {
            "top-categories": {
                "top_hits": {
                    "size" : 3
                }
            }
        }
    }
}

---

我还尝试创建一个 top_hits 聚合与一个子聚合，以获得顶级类别，但没有

---

I've also tried creating a top_hits aggregation with a sub-aggregation within to get the top categories but that doesn't work either.

{
    "aggs": {
        "top-categories": {
            "top_hits": {
                "size" : 100
            }
            "aggs": {
                "product_categories": {
                    "terms": {
                        "field": "product_category",
                        "size": 3,
                    }
                }
            }
        }
    }
}

---

有人可以帮我解决这个问题吗？

---

Can anyone help me with this problem?

推荐答案

您可以尝试使用过滤器基于 limit 过滤器，并在其中嵌套您的术语聚合。

You could try using a filter aggregation based on a limit filter, and nest your terms aggregation in it.

请注意，限制在shard级应用（请参阅文档）。

Be aware that the limit is applied at shard level (see the documentation).

这应该为你的情况做的工作，一个查询，如：

However, this should do the job for your case, with a query like :

{
  "aggs": {
    "limit_results": {
      "filter": {
        "limit": {
          "value": 100
        }
      },
      "aggs": {
        "product_categories": {
          "terms": {
            "field": "product_category",
            "size": 10
          }
        }
      }
    }
  }
}

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