ES 重写分数查询

场景需求

一个模型多个字段，给每个字段的匹配都设定相应的分值，总和大于某个分值则认为匹配成功

官网地址

https://www.elastic.co/guide/en/elasticsearch/reference/8.1/query-dsl-function-score-query.html

实现方案

# 索引设置
PUT /test_index
{
  "settings": {
    "index": {
      "analysis": {
        "analyzer": {
          "my_ik": {
            "type": "custom",
            "tokenizer": "ik_smart",
            "filter": [
              "my_synonym"
            ]
          }
        },
        "filter": {
          "my_synonym": {
            "type": "synonym_graph",
            "synonyms_path": "analysis/synonym.txt"
          }
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "key1": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        },
        "analyzer": "my_ik"
      },
      "key2": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        },
        "analyzer": "my_ik"
      },
      "key3": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        },
        "analyzer": "my_ik"
      },
      "key4": {
        "type": "text",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        },
        "analyzer": "my_ik"
      },
      "context": {
        "type": "text",
        "analyzer": "ik_max_word",
        "search_analyzer": "ik_smart"
      }
    }
  }
}

# 数据插入
POST _bulk
{"index":{"_index":"test_index","_id":1}}
{"key1":"1","key2":"11","key3":"111","key4":"1111"}
{"index":{"_index":"test_index","_id":2}}
{"key1":"2","key2":"22","key3":"2222","key4":"2222"}
{"index":{"_index":"test_index","_id":3}}
{"key1":"3","key2":"33","key3":"333","key4":"3333"}
{"index":{"_index":"test_index","_id":4}}
{"key1":"4","key2":"44","key3":"444","key4":"4444","context":"张老师"}

# 查询
GET test_index/_search
{
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "should": [
            {
              "terms": {
                "key1": [
                  "1"
                ]
              }
            },
            {
              "terms": {
                "key3": [
                  "red"
                ]
              }
            }
          ]
        }
      },
      "functions": [
        {
          "filter": {
            "terms": {
              "key1": [
                "1"
              ]
            }
          },
          "weight": 1
        },
        {
          "filter": {
            "term": {
              "key2": "22"
            }
          },
          "weight": 2
        }
      ],
      "max_boost": 100,
      "score_mode": "sum",
      "boost_mode": "replace",
      "min_score": 1
    }
  }
}