elasticsearch - 如何在 Elasticsearch 中编写执行 field1 AND (field2 OR field3) 的 bool 查询

Question

我有一个包含三个字符串字段“user_id”、“headline”和“note”的索引。我想搜索 A)属于特定用户并且 B)在“标题”或“注释”中具有文本匹配的文档。我正在使用 AWS Elasticsearch 7.4，并且没有完成任何架构或映射 - 我只是开始根据索引发布文档。

我尝试的是这样的:

          query = {
                "bool": {
                    "should": [
                        {"match": {"headline": search_text}},
                        {"match": {"note": search_text}}
                    ],
                    "must": {"match": {"user_id": user_id}}
                }
            } 

这有效，但它会找到搜索文本与“标题”或“注释”不匹配的文档。基本上我需要一个 bool 查询: user_id = :user_id AND (headline = :search_text OR note = :search_text)

Answer 1

由于 bool 子句的不正确使用，您现有的查询无法正常工作，其工作根据请参阅 https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-query.html有关 bool 查询的更多详细信息

user_id = :user_id OR (headline = :search_text OR note = :search_text)

在我的本地使用示例文档测试了完整的工作示例:

通过定义映射对三个示例文档建立索引:

{
  "user_id" : "1",
  "headline" : "today",
  "note" : "today"
}


{
  "user_id" : "1",
  "headline" : "tomorrow",
  "note" : "today"
}

{
  "user_id" : "1",
  "headline" : "tomorrow",
  "note" : "tomorrow"
}

根据您的情况，搜索user_id 1 和 text = today 时仅搜索 doc 1 和 2必须归还。

正确的搜索查询

{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "user_id": "1"
          }
        },
        {
          "multi_match": {
            "query": "today",
            "fields": [
              "headline",
              "note"
            ]
          }
        }
      ]
    }
  }
}

搜索结果

 "hits": [
      {
        "_index": "booleanaws",
        "_type": "_doc",
        "_id": "1",
        "_score": 1.1143606,
        "_source": {
          "user_id": "1",
          "headline": "today",
          "note": "today"
        }
      },
      {
        "_index": "booleanaws",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.603535,
        "_source": {
          "user_id": "1",
          "headline": "tomorrow",
          "note": "today"
        }
      }
    ]