文章目錄

查看field的能力，就是是否可以被搜索等能力的查看,這個時機上是mapping定義的時候決定的，這個輔助了對mapping定義的理解

使用方式

cluster中所有index的所有fating fieldGET _field_caps?fields=rating某個index的rating field GET twitter/_field_caps?fields=rating多個field GET _field_caps?fields=rating,title

樣例

GET _field_caps?fields=rating,title{"indices": ["index1", "index2", "index3", "index4", "index5"],"fields": {"rating": { "long": {"searchable": true,"aggregatable": false,"indices": ["index1", "index2"],"non_aggregatable_indices": ["index1"] },"keyword": {"searchable": false,"aggregatable": true,"indices": ["index3", "index4"],"non_searchable_indices": ["index4"] }},"title": { "text": {"searchable": true,"aggregatable": false}}} }

默認情況下unmapped的field會被忽略，這些字段一般是沒有內(nèi)容,可以通過設(shè)置include_unmapped 參數(shù)打開

GET _field_caps?fields=rating,title&include_unmapped返回 {"indices": ["index1", "index2", "index3"],"fields": {"rating": {"long": {"searchable": true,"aggregatable": false,"indices": ["index1", "index2"],"non_aggregatable_indices": ["index1"]},"keyword": {"searchable": false,"aggregatable": true,"indices": ["index3", "index4"],"non_searchable_indices": ["index4"]},"unmapped": { "indices": ["index5"],"searchable": false,"aggregatable": false}},"title": {"text": {"indices": ["index1", "index2", "index3", "index4"],"searchable": true,"aggregatable": false},"unmapped": { "indices": ["index5"]"searchable": false,"aggregatable": false}}} }

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