文章目錄

• 概述
• 官網
• 示例

---

概述

繼續跟中華石杉老師學習ES，第55篇

課程地址： https://www.roncoo.com/view/55

---

官網

Top Hits Aggregation : 戳這里

其他詳見官網

---

示例

需求： 對每個用戶發表的博客進行分組

模擬一批數據

PUT /blogs2/blogs2/2 {"title": "2跟石杉老師學ES","content": "2-second blog","userInfo": {"userId": 2,"username": "2小工匠"} }PUT /blogs2/blogs2/3 {"title": "3跟石杉老師學ES","content": "3-second blog","userInfo": {"userId": 3,"username": "3小工匠"} }PUT /blogs2/blogs2/4 {"title": "4跟石杉老師學ES","content": "4-second blog","userInfo": {"userId": 4,"username": "4小工匠"} }PUT /blogs2/blogs2/5 {"title": "5跟石杉老師學ES","content": "5-second blog","userInfo": {"userId": 2,"username": "2小工匠"} }PUT /blogs2/blogs2/6 {"title": "6跟石杉老師學ES","content": "6-second blog","userInfo": {"userId": 3,"username": "3小工匠"} }PUT /blogs2/blogs2/7 {"title": "7跟石杉老師學ES","content": "7-second blog","userInfo": {"userId": 4,"username": "4小工匠"} }

DSL

#對每個用戶發表的博客進行分組,取前5篇的標題 GET /blogs2/blogs2/_search {"size": 0,"aggs": {"group_by_userName": {"terms": {"field": "userInfo.username.keyword"},"aggs": {"top_blog": {"top_hits": {"_source": {"includes": "title"},"size": 5}}}}} }

返回：

{"took": 9,"timed_out": false,"_shards": {"total": 5,"successful": 5,"skipped": 0,"failed": 0},"hits": {"total": 7,"max_score": 0,"hits": []},"aggregations": {"group_by_userName": {"doc_count_error_upper_bound": 0,"sum_other_doc_count": 0,"buckets": [{"key": "2小工匠","doc_count": 2,"first_blog": {"hits": {"total": 2,"max_score": 1,"hits": [{"_index": "blogs2","_type": "blogs2","_id": "5","_score": 1,"_source": {"title": "5跟石杉老師學ES"}},{"_index": "blogs2","_type": "blogs2","_id": "2","_score": 1,"_source": {"title": "2跟石杉老師學ES"}}]}}},{"key": "3小工匠","doc_count": 2,"first_blog": {"hits": {"total": 2,"max_score": 1,"hits": [{"_index": "blogs2","_type": "blogs2","_id": "6","_score": 1,"_source": {"title": "6跟石杉老師學ES"}},{"_index": "blogs2","_type": "blogs2","_id": "3","_score": 1,"_source": {"title": "3跟石杉老師學ES"}}]}}},{"key": "4小工匠","doc_count": 2,"first_blog": {"hits": {"total": 2,"max_score": 1,"hits": [{"_index": "blogs2","_type": "blogs2","_id": "4","_score": 1,"_source": {"title": "4跟石杉老師學ES"}},{"_index": "blogs2","_type": "blogs2","_id": "7","_score": 1,"_source": {"title": "7跟石杉老師學ES"}}]}}},{"key": "小工匠","doc_count": 1,"first_blog": {"hits": {"total": 1,"max_score": 1,"hits": [{"_index": "blogs2","_type": "blogs2","_id": "1","_score": 1,"_source": {"title": "跟石杉老師學ES"}}]}}}]}} }

總結

以上是生活随笔為你收集整理的白话Elasticsearch55-数据建模之对每个用户发表的博客进行分组 （Top Hits Aggregation）的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。