文章目錄

• 概述
• 官網
• 示例
• • 模擬：文件系統數據構造
  • 測試path_hierarchy分詞
  • 需求一： 查找一份，內容包括ES，在/workspace/workspace/projects/helloworld這個目錄下的文件
  • 需求二： 搜索/workspace目錄下，內容包含ES的所有的文件

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概述

繼續跟中華石杉老師學習ES，第56篇

課程地址： https://www.roncoo.com/view/55

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官網

簡言之，就是對類似文件系統這種的有多層級關系的數據進行分詞

Path Hierarchy Tokenizer：戳這里

Path Hierarchy Tokenizer Examples：戳這里

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示例

模擬：文件系統數據構造

PUT /filesystem {"settings": {"analysis": {"analyzer": {"paths": { "tokenizer": "path_hierarchy"}}}} }

測試path_hierarchy分詞

POST filesystem/_analyze {"tokenizer": "path_hierarchy","text": "/home/elasticsearch/image" }

返回：

{"tokens": [{"token": "/home","start_offset": 0,"end_offset": 5,"type": "word","position": 0},{"token": "/home/elasticsearch","start_offset": 0,"end_offset": 19,"type": "word","position": 0},{"token": "/home/elasticsearch/image","start_offset": 0,"end_offset": 25,"type": "word","position": 0}] }

path_hierarchy tokenizer: 會把/a/b/c/d路徑通過path_hierarchy 分詞為 /a/b/c/d, /a/b/c, /a/b, /a

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需求一： 查找一份，內容包括ES，在/workspace/workspace/projects/helloworld這個目錄下的文件

手動指定字段類型，并模擬個數據到索引

#指定字段類型 PUT /filesystem/_mapping/file {"properties": {"name": { "type": "keyword"},"path": { "type": "keyword","fields": {"tree": { "type": "text","analyzer": "paths"}}}} }#查看映射 GET /filesystem/_mapping#寫入數據 PUT /filesystem/file/1 {"name": "README.txt", "path": "/workspace/projects/helloworld", "contents": "小工匠跟石杉老師學習ES" }

需求DSL:

#文件搜索需求：查找一份，內容包括ES，在/workspace/workspace/projects/helloworld這個目錄下的文件GET /filesystem/_search {"query": {"bool": {"must": [{"match": {"contents": "ES"}}],"filter": {"term": {"path": "/workspace/projects/helloworld"}}}} }

返回：

需求二： 搜索/workspace目錄下，內容包含ES的所有的文件

再寫幾條數據進去

PUT /filesystem/file/2 {"name": "README.txt", "path": "/workspace/projects", "contents": "小工匠跟石杉老師學習ES" }PUT /filesystem/file/3 {"name": "README.txt", "path": "/workspace/xxxxx", "contents": "小工匠跟石杉老師學習ES" }PUT /filesystem/file/4 {"name": "README.txt", "path": "/home/artisan", "contents": "小工匠跟石杉老師學習ES" }PUT /filesystem/file/5 {"name": "README.txt", "path": "/workspace", "contents": "小工匠跟石杉老師學習ES" }

需求DSL： "path.tree": "/workspace"

GET filesystem/_search {"query": {"bool": {"must": [{"match": {"contents": "ES"}}],"filter": {"term": {"path.tree": "/workspace"}}}} }

返回：

{"took": 8,"timed_out": false,"_shards": {"total": 5,"successful": 5,"skipped": 0,"failed": 0},"hits": {"total": 4,"max_score": 0.2876821,"hits": [{"_index": "filesystem","_type": "file","_id": "5","_score": 0.2876821,"_source": {"name": "README.txt","path": "/workspace","contents": "小工匠跟石杉老師學習ES"}},{"_index": "filesystem","_type": "file","_id": "1","_score": 0.2876821,"_source": {"name": "README.txt","path": "/workspace/projects/helloworld","contents": "小工匠跟石杉老師學習ES"}},{"_index": "filesystem","_type": "file","_id": "3","_score": 0.2876821,"_source": {"name": "README.txt","path": "/workspace/xxxxx","contents": "小工匠跟石杉老師學習ES"}},{"_index": "filesystem","_type": "file","_id": "2","_score": 0.18232156,"_source": {"name": "README.txt","path": "/workspace/projects","contents": "小工匠跟石杉老師學習ES"}}]} }

可以看到id=4的數據，不符合需求，沒有被查詢出來，OK。

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