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                # Has Parent Query has_parent查詢接受一個查詢和父類型。查詢是在父文檔空間上執行的,它是被被父類型指定的。查詢返回相關父文檔匹配到的子文檔。剩下的設置選項和has_child查詢一樣 | `curl -XGET?``'localhost:9200/_search?pretty'`?`-d'` `{` `"query"``: {` `"has_parent"`?`: {` `"parent_type"`?`:?``"blog"``,` `"query"`?`: {` `"term"`?`: {` `"tag"`?`:?``"something"` `}` `}` `}` `}` `}'` | ## Scoring Capabilities(打分能力) has_parent也支持打分。默認的是flase,將忽略父文檔的分數。這里的分數與has_parent查詢(默認為1)的分數等同。如果score設置為true,則匹配的 parent 文檔的分數就被聚合在 child 文檔中屬于匹配的 parent 文檔。打分模式可以使用?`score_mode`?在?`has_parent`?query 中指定: | `curl -XGET?``'localhost:9200/_search?pretty'`?`-d'` `{` `"query"``: {` `"has_parent"`?`: {` `"parent_type"`?`:?``"blog"``,` `"score"`?`:?``true``,` `"query"`?`: {` `"term"`?`: {` `"tag"`?`:?``"something"` `}` `}` `}` `}` `}'` | ## ignore unmapped(忽略未映射的) 當將ignore_unmapped設置為true時,將忽略一個為被映射的類型,該查詢不能匹配任何文檔。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。 ## Sorting(排序) 子文檔不能以父文檔中的排序字段來排序。如果你需要通過父文檔中的字段來排序子文檔,則你可以用function_score查詢,通過_score來排序。 通過父文檔中的view_count字段排序tags: | `curl -XGET?``'localhost:9200/_search?pretty'`?`-d'` `{` `"query"``: {` `"has_parent"`?`: {` `"parent_type"`?`:?``"blog"``,` `"score"`?`:?``true``,` `"query"`?`: {` `"function_score"`?`: {` `"script_score"``: {` `"script"``:?``"_score * doc[\u0027view_count\u0027].value"` `}` `}` `}` `}` `}` `}'` |
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