Question

我想在文档中添加一个可以搜索的字段，但是当我们进行获取/搜索时，它不应出现在_source下。

我尝试过索引和存储选项，但是无法通过它实现。它更像是_all或copy_to，但就我而言，值是由我提供的（不是从文档的其他字段收集的）。

我正在寻找可以实现以下情况的映射。

当我放置文档时：

PUT my_index/_doc/1
{
  "title":   "Some short title",
  "date":    "2015-01-01",
  "content": "A very long content field..."
}

然后搜索

获取my_index / _search

输出应为

{
    "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "title" : "Some short title",
          "date" : "2015-01-01"
        }
      }
    ]
  }
}

当我进行以下搜索时

GET my_index/_search
{
  "query": {
    "query_string": {
      "default_field": "content",
      "query": "long content"
    }
  }
}

它应该导致我

"hits" : {
    "total" : 1,
    "max_score" : 0.5753642,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 0.5753642,
        "_source" : {
          "title" : "Some short title",
          "date" : "2015-01-01"
        }
      }
    ]
  }

Answer 1

只需使用source filtering来排除let doSomethingResolveCallback; let doSomethingRejectCallback; function doSomething() { return new Promise(resolve, reject) => { doSomethingResolveCallback = resolve; doSomethingRejectCallback = reject; targetiFrame.postMessage('actionA'); } } // handles messages from the iFrame function handleMessage(event) { if (event.action === "answerToActionA") { doSomethingResolveCallback(event.data); } }字段：

content

Answer 2

我们可以使用下面的映射实现这一点：

PUT my_index
{
  "mappings": {

    "_doc": {
      "_source": {
        "excludes": [
          "content"
        ]
      },
      "properties": {
        "title": {
          "type": "text",
          "store": true 
        },
        "date": {
          "type": "date",
          "store": true 
        },
        "content": {
          "type": "text"
        }
      }
    }
  }
}

添加文档：

PUT my_index/_doc/1
{
  "title":   "Some short title",
  "date":    "2015-01-01",
  "content": "A very long content field..."
}

运行查询以在“内容”字段上搜索内容时：

GET my_index/_search
{
  "query": {
    "query_string": {
      "default_field": "content",
      "query": "long content"
    }
  }
}

您将获得如下匹配的结果：

"hits" : {
    "total" : 1,
    "max_score" : 0.5753642,
    "hits" : [
      {
        "_index" : "my_index",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 0.5753642,
        "_source" : {
          "date" : "2015-01-01",
          "title" : "Some short title"
        }
      }
    ]
  }

它隐藏字段“内容”。：）

因此，在映射的帮助下实现了这一目标。您不必在每次进行get / search调用时都将其从查询中排除。

更多阅读源： https://www.elastic.co/guide/en/elasticsearch/reference/6.6/mapping-source-field.html

有什么方法可以在文档中添加该字段，但对_source隐藏该字段，还应该对文档进行分析和搜索

2 个答案: