从每个唯一的存储桶中查找前5个文档 [英] Find top 5 documents from each unique bucket

问题描述

让我们说，我有许多ElasticSearch文档，例如以下示例:

Let us say that I've a number of ElasticSearch documents like the sample given below:

 {
    "Tagname": [
        "Veniam"
    ],
    "Title": [
        "Occaecat do. Eu ut."
    ]
  },
  ...
  ...
  ...
  {
    "Tagname": [
        "Anim"
    ],
    "Title": [
        "Consectetur dolor consectetur eu."
    ]
  },
  ...
  ...
  ...
  {
    "Tagname": [
        "Aliqua"
    ],
    "Title": [
        "Culpa in ut ut. Enim in excepteur eiusmod."
    ]
  }
  ...
  ...
  ...   

在此，假设 Tagname 是每个 Title 所属的标签的名称.并且 Tagname 被映射为 keyword ，这样，当我在 Tagname.keyword 上进行汇总时，我得到了3个唯一的 TagName桶(Veniam，Anim，Aliqua等).就我而言，假设我们没有固定数量的唯一 TagName ，并且它可能会动态变化.因此，我们不能在搜索查询中假设一个唯一的 TagName 的静态列表.

Here, lets assume that Tagname is the name of the tag under which every Title falls. And Tagname is mapped as a keyword, such that when I aggregate on the Tagname.keyword, I get for example 3 unique TagName buckets (Veniam, Anim, Aliqua, etc...). In my case lets assume we do not have a fixed number of unique TagName and it might change dynamically. So, we can not assume a static list of unique TagName in our search query.

我现在想要实现的是在每个存储桶下获得前5个