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                # Parent Id Query 原文鏈接 [https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-parent-id-query.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-parent-id-query.html) 譯文鏈接 [http://www.apache.wiki/pages/createpage.action?spaceKey=Elasticsearch&fromPageId=4260708](http://www.apache.wiki/pages/createpage.action?spaceKey=Elasticsearch&fromPageId=4260708) 貢獻者 [小蚊子](/display/~lishuwen) 注意 V5.0.0中新添加? parent_id 查詢可以用來查找那些屬于一個特殊父類型的子文檔。給出如下映射的定義: ``` curl -XPUT 'localhost:9200/my_index?pretty' -d' { "mappings": { "blog_post": { "properties": { "name": { "type": "keyword" } } }, "blog_tag": { "_parent": { "type": "blog_post" }, "_routing": { "required": true } } } }' ``` ``` curl -XGET 'localhost:9200/my_index/_search?pretty' -d' { "query": { "parent_id" : { "type" : "blog_tag", "id" : "1" } } }' ``` 上面的設置與使用下面的?[`has_parent`](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-has-parent-query.html "Has Parent Query")查詢在功能上相似,但是如果不需要做連接的話,下面的操作會更好。 ``` curl -XGET 'localhost:9200/my_index/_search?pretty' -d' { "query": { "has_parent": { "parent_type": "blog_post", "query": { "term": { "_id": "1" } } } } }' ``` ## Parameters(參數) 這個查詢有兩個必備的參數。 | ? | ? | | --- | --- | | type | 子類型。必須是一個_parent字段定義的類型 | | id | 選擇文檔必須參照要求的parent文檔id | | ignore_unmapped | 當設置為true時,這個參數將忽略一個未被映射的類型,這個查詢將不匹配任何文檔。這個在可能產生不同的映射的多索引查詢中起作用。當設置為flase(默認值),如果類型未被映射,則查詢將報異常。 |
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