1

我正在使用 Elasticsearch v 7.3.1 并尝试实现部分搜索。所有搜索都很顺利，但是当我查询“ John Oxford ”时，“John”与文档匹配，但整个文档中没有“ Oxford ”。但仍然向我显示文档而不是显示空结果。

我该怎么做才能在我们查询John Oxford时不返回文档？

我的映射、设置、示例文档和学生数据查询如下。

映射

PUT student
{
  "settings": {
    "analysis": {
      "filter": {
        "autocomplete_filter": {
          "type": "edge_ngram",
          "min_gram": 1,
          "max_gram": 20
        }
      },
      "analyzer": {
        "autocomplete": { 
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "autocomplete_filter"
          ]
        }
      }
    }
  }, "mappings" : {
      "properties" : {
        "DOB" : {
          "type" : "text"
        },
        "email" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "first_name" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "home_phone" : {
          "type" : "text"
        },
        "last_name" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "student_id" : {
          "type" : "text"
        }
      }
    }
}

样本文件

POST student/_doc
{
    "DOB": "1983-12-04",
    "email": "johndoe@gmail.fr",
    "first_name": "john",
    "home_phone": 1242432,
    "last_name": "doe",
    "student_id": 28

}

询问

GET student/_search
{
  "query": {
    "multi_match": {
      "query": "john oxford",
      "type": "bool_prefix",
      "analyzer": "standard",
      "fields": [
        "first_name",
        "last_name",
        "email",
        "DOB",
        "home_phone",
        "student_id"
      ]
    }
  }
}

以下是我想要的结果

  • 1242 - 部分匹配 home_phone
  • joh do - 部分匹配“John”和“Doe”
  • 1983-12-04 - 匹配 DOB
  • johndoe - 电子邮件部分匹配
  • doe - 匹配姓氏
4

1 回答 1

2

要实现部分搜索，您应该将特定添加autocomplete analyzer到所需的文本字段并实施特定search_analyzer，因为您正在使用edgengram过滤器 - 请阅读此处和此处以获取说明。正如您所做的那样，这比在查询时指定分析器更舒服。尝试：

PUT student
{
  "settings": {
    "analysis": {
      "filter": {
        "autocomplete_filter": {
          "type": "edge_ngram",
          "min_gram": 1,
          "max_gram": 20
        }
      },
      "analyzer": {
        "autocomplete": { 
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "autocomplete_filter"
          ]
        }
      }
    }
  }, "mappings" : {
      "properties" : {
        "DOB" : {
          "type" : "text",
          "analyzer": "autocomplete",
          "search_analyzer": "standard"
        },
        "email" : {
          "type" : "text",
          "analyzer": "autocomplete",
          "search_analyzer": "standard",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "first_name" : {
          "type" : "text",
          "analyzer": "autocomplete",
          "search_analyzer": "standard",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "home_phone" : {
          "type" : "text",
          "analyzer": "autocomplete",
          "search_analyzer": "standard"
        },
        "last_name" : {
          "type" : "text",
          "analyzer": "autocomplete",
          "search_analyzer": "standard",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "student_id" : {
          "type" : "text"
        }
      }
    }
}

然后，当您查询两个术语的自动完成时，您应该将它们与and运算符连接起来。对于您的用例，跨字段类型应该是最好的：

GET student/_search
{
  "query": {
    "multi_match" : {
      "query":      "John Oxford",
      "type":       "cross_fields",
      "fields": [
        "first_name",
        "last_name",
        "email",
        "DOB",
        "home_phone",
        "student_id"
      ],
      "operator":   "and" 
    }
  }
}
于 2020-04-16T09:22:11.523 回答