模糊查询没有给出任何结果

Question

elastic search 中的模糊查询不起作用，即使使用精确值结果也是空的。

ES 版本：7.6.2

索引映射：下面是映射的详细信息

{
  "movies" : {
    "mappings" : {
      "properties" : {
        "genre" : {
          "type" : "text",
          "fields" : {
            "field" : {
              "type" : "keyword"
            }
          }
        },
        "id" : {
          "type" : "long"
        },
        "rating" : {
          "type" : "double"
        },
        "title" : {
          "type" : "text"
        }
      }
    }
  }
}

文档：索引中存在以下文档

    {
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "movies",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "id" : 2,
          "title" : "Raju Ban gaya gentleman",
          "rating" : 2,
          "genre" : [
            "Drama"
          ]
        }
      },
      {
        "_index" : "movies",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 1.0,
        "_source" : {
          "id" : 2,
          "title" : "Baat ban jaegi gentleman",
          "rating" : 4,
          "genre" : [
            "Drama"
          ]
        }
      }
    ]
  }
}

查询： 下面是我用来搜索文档的查询

GET movies/_search
{
  "query": {
    "fuzzy": {
      "title": {"value": "Bat ban jaegi gentleman", "fuzziness": 1}
    }
  }
}

我以前没有使用过模糊查询，根据我的理解，它应该可以正常工作。

Answer 1

不分析模糊查询，但该字段是您搜索的 Bat ban jaegi gentleman 将被分成不同的术语，Bat 将被分析，该术语将进一步用于过滤结果。

为什么要对字段进行模糊查询分析，也可以参考这个回答ElasticSearch's Fuzzy Query

但由于您要分析完整的标题，您可以更改 title 的映射以包含 keyword 字段。

您可以通过分析 API 查看您的字符串将如何被准确标记化： http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-analyze.html

下面是相同的映射：

"mappings": {
        "properties": {
            "genre": {
                "type": "text",
                "fields": {
                    "field": {
                        "type": "keyword"
                    }
                }
            },
            "id": {
                "type": "long"
            },
            "rating": {
                "type": "double"
            },
            "title": {
                "type": "text",
                "fields": {
                    "field": {
                        "type": "keyword"
                    }
                }
            }
        }
    }

现在，如果您在 title.field 上搜索，您将得到想要的结果。搜索查询是：

    {
  "query": {
    "fuzzy": {
      "title.field": {"value": "Bat ban jaegi gentleman", "fuzziness": 1}
    }
  }
}

本例得到的结果是：

"hits": [
      {
        "_index": "ftestmovies",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.9381845,
        "_source": {
          "title": "Baat ban jaegi gentleman",
          "rating": 4,
          "genre": [
            "Drama"
          ]
        }
      }
    ]

模糊查询没有给出任何结果

Fuzzy query not giving any results

elasticsearch

fuzzy-search

elasticsearch-query