如何在弹性搜索中使嵌套字段中的子字段变平？

如何解决如何在弹性搜索中使嵌套字段中的子字段变平？

在这里，我有一个索引文件，如：

doc = {  
  "id": 1,"content": [  
    {  
      "txt": I,"time": 0,},{  
      "txt": have,"time": 1,{  
      "txt": a book,"time": 2,{  
      "txt": do not match this block,"time": 3,]  
}  

我想匹配“我有一本书”，并返回匹配的时间：0,1,2。有谁知道如何针对这种情况建立索引和查询？ 我认为应该将“ content.txt”弄平，但应该嵌套“ content.time”？

解决方法

想要匹配“我有一本书”，并返回匹配的时间：0,1,2。

添加带有索引映射，搜索查询和搜索结果的工作示例

索引映射：

{
  "mappings": {
    "properties": {
      "content": {
        "type": "nested"
      }
    }
  }
}

搜索查询：

{
  "query": {
    "nested": {
      "path": "content","query": {
        "bool": {
          "must": [
            {
              "match": {
                "content.txt": "I have a book"
              }
            }
          ]
        }
      },"inner_hits": {}
    }
  }
}

搜索结果：

"inner_hits": {
          "content": {
            "hits": {
              "total": {
                "value": 3,"relation": "eq"
              },"max_score": 2.5226097,"hits": [
                {
                  "_index": "64752029","_type": "_doc","_id": "1","_nested": {
                    "field": "content","offset": 2
                  },"_score": 2.5226097,"_source": {
                    "txt": "a book","time": 2
                  }
                },{
                  "_index": "64752029","offset": 0
                  },"_score": 1.5580825,"_source": {
                    "txt": "I","time": 0
                  }
                },"offset": 1
                  },"_source": {
                    "txt": "have","time": 1
                  }
                }
              ]
            }
          }
        }
      }