Elasticsearch-使用路径层次标记器访问不同级别的类别

我发现这样做的唯一方法是使用exclude语法排除不需要的级别。

    {   "aggs": {      "category": {         "terms": { "field": "group_path", "size": 0,  "exclude" : ".*\..*"         }      }   }}

然后将返回

aggregations: {     category: {       buckets: [          {  key: Book  doc_count: 1          }          {  key: DVD doc_count: 1          }       ]     }}

如果您选择书籍，则可以像这样搜索

{    "query" : {        "filtered": { "filter": {        "prefix": {          "group_path": "Book"        } }        }    },    "aggs" : {      "category": {        "terms": {          "field": "group_path",          "size": 0,          "include" : "Book\..*",          "exclude": ".*\..*\..*"        }      }    }}

然后将返回

aggregations: {     category: {       buckets: [          {  key: Book.Thriller  doc_count: 1          }       ]     }}