在ElasticSearch上等效的Solr的copyField？

Question

有人能告诉我ElasticSearch上是否有相同的Solr copyField指令？

我知道有多字段类型: http ://www.elasticsearch.org/guide/reference/mapping/multi-field-type.html当你想在同一个字段上应用多个分析器时,这很好.

但它并不完全相同.Solr允许将多个字段"合并"为一个:

<field name="id" type="string" indexed="true" stored="true"/>
<field name="name" type="string" indexed="true" stored="true"/>
<field name="subject" type="string" indexed="true" stored="true"/>
<field name="location" type="string" indexed="true" stored="true"/>
<field name="all" type="text" indexed="true" stored="true" multiValued="true"/>
<copyField source="*" dest="all"/>

---

这个插件很有前途:https: //github.com/yakaz/elasticsearch-analysis-combo

因为它允许在使用ElasticSearch多值字段时将结果作为单个字段返回.但它仍然不完全相同,因为它不允许"合并"多个字段.

---

我想要Combo分析器和Solr copyField的组合.

我有一个博客文章模型(标题/描述字段),并希望在单个字段"blogContent"上复制标题和描述,我将在其中应用2个不同的分析器.

ElasticSearch有解决方案吗？

Answer 1

有特殊的_all领域,默认情况下得到所有其他领域的副本.您可以_all使用include_in_all属性控制包含到字段中.但是,您只能使用这样的一个字段.如果您需要多个,则需要通过搜索多个字段在搜索端处理它.

它也可以通过使用来实现类似的功能copyField multi_field与"path": "just_name"属性:

curl -XPUT localhost:9200/test-idx -d '{
    "settings": {
        "index": {
            "number_of_shards": 1,
            "number_of_replicas": 0
        }
    },
    "mappings": {
        "doc": {
            "properties": {
                "first_name": {
                    "type": "multi_field",
                    "path": "just_name",
                    "fields": {
                        "first_name": {"type": "string", "index": "analyzed"},
                        "name": {"type": "string","index": "analyzed"}
                    }
                },
                "last_name": {
                    "type": "multi_field",
                    "path": "just_name",
                    "fields": {
                        "last_name": {"type": "string", "index": "analyzed"},
                        "name": {"type": "string","index": "analyzed"}
                    }
                }
            }
        }
    }
}'
echo
curl -XPUT localhost:9200/test-idx/doc/1 -d '{
    "first_name": "Sebastien",
    "last_name": "Lorber"
}'
echo
curl -XPOST localhost:9200/test-idx/_refresh
echo
curl "localhost:9200/test-idx/doc/_search?q=name:Sebastien"
echo
curl "localhost:9200/test-idx/doc/_search?q=name:Lorber"

Answer 2

弹性搜索支持copyTo:

• 旧链接(死):http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/mapping-core-types.html#copy-to
• 参考文献中的当前链接:https://www.elastic.co/guide/en/elasticsearch/reference/current/copy-to.html
• 指南中的当前链接:https://www.elastic.co/guide/en/elasticsearch/guide/current/custom-all.html

您可以在要复制到的字段上添加分析器.