首发于 qwer后端开发笔记

Es搜索优化（五）-自动补齐/自动推荐/荐词

qwer

救我妈保大的。

我在用 Elasticsearch 做搜索期间总共写了五篇大家可以关联着看，希望可以解决大家开发中遇到的一些问题

1. what

举例，我们使用Google的时候，Google会提示我们

2. why

3. how

3.2.1 建立对应的index（completion 实现）

curl -XPUT "localhost:9200/test_index?pretty=true" -H 'content-type: application/json' --data '
{
    "settings": {
        "number_of_shards": 1
    },
    "mappings": {
        "properties": {
            "id": {
                "type": "keyword"
            },
            "title": {
                "type": "completion",
                "analyzer": "ik_max_word",
                "search_analyzer": "ik_smart"
            },
            "content": {
                "type": "completion",
                "analyzer": "ik_max_word",
                "search_analyzer": "ik_smart"
            },
            "status": {
                "type": "keyword"
            }
        }
    }
}
'

curl -XPOST "localhost:9200/test_index/_doc/?pretty=true" -H 'content-type: application/json' --data '
{
    "id": 1,
    "title": "春节碰到自己的前男友怎么办？",
    "content": "如题",
    "status": "1"
}
'
curl -XPOST "localhost:9200/test_index/_doc/?pretty=true" -H 'content-type: application/json' --data '
{
    "id": 1,
    "title": "春节碰到自己的前女友怎么办？",
    "content": "如题",
    "status": "1"
}
'
curl -XPOST "localhost:9200/test_index/_doc/?pretty=true" -H 'content-type: application/json' --data '
{
    "id": 1,
    "title": "春节碰到自己的老师怎么办？",
    "content": "如题",
    "status": "1"
}
'
curl -XPOST "localhost:9200/test_index/_doc/?pretty=true" -H 'content-type: application/json' --data '
{
    "id": 1,
    "title": "春节碰到自己的老师怎么办？我应该打招呼吗？",
    "content": "如题",
    "status": "1"
}
'

3.2.2 进行相应的查询

curl -XPOST "localhost:9200/test_index/_doc/_search?pretty=true" -H 'content-type: application/json' --data '
{
    "suggest": {
        "suggest_1": {
            "text": "春节碰",
            "completion": {
                "field": "title",
        "skip_duplicates": true
            }
        }
    }
}
'

## response

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 0,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
  },
  "suggest" : {
    "suggest_1" : [
      {
        "text" : "春节碰",
        "offset" : 0,
        "length" : 3,
        "options" : [
          {
            "text" : "春节碰到自己的前女友怎么办？",
            "_index" : "test_index",
            "_type" : "_doc",
            "_id" : "eOZ-bX8BVW9cjfXV7UG_",
            "_score" : 1.0,
            "_source" : {
              "id" : 1,
              "title" : "春节碰到自己的前女友怎么办？",
              "content" : "如题",
              "status" : "1"
            }
          },
          {
            "text" : "春节碰到自己的前男友怎么办？",
            "_index" : "test_index",
            "_type" : "_doc",
            "_id" : "d-Z-bX8BVW9cjfXV7UGS",
            "_score" : 1.0,
            "_source" : {
              "id" : 1,
              "title" : "春节碰到自己的前男友怎么办？",
              "content" : "如题",
              "status" : "1"
            }
          },
          {
            "text" : "春节碰到自己的老师怎么办？",
            "_index" : "test_index",
            "_type" : "_doc",
            "_id" : "eeZ-bX8BVW9cjfXV7UHr",
            "_score" : 1.0,
            "_source" : {
              "id" : 1,
              "title" : "春节碰到自己的老师怎么办？",
              "content" : "如题",
              "status" : "1"
            }
          },
          {
            "text" : "春节碰到自己的老师怎么办？我应该打招呼吗？",
            "_index" : "test_index",
            "_type" : "_doc",
            "_id" : "euZ-bX8BVW9cjfXV7kEg",
            "_score" : 1.0,
            "_source" : {
              "id" : 1,
              "title" : "春节碰到自己的老师怎么办？我应该打招呼吗？",
              "content" : "如题",
              "status" : "1"
            }
          }
        ]
      }
    ]
  }
}

3.3.2 match phrase prefix query 实现

4. 参考链接

编辑于 2022-10-21 20:11

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qwer后端开发笔记

分享一些后端开发中用到的技术，和自己总结的方法论。