elasticsearch - 获得独特条款的计数

Question

在elasticsearch中，我想要获得唯一的术语以及该术语的数量。

index:
doc1: filetype(multivalued): pdf, zip, zip, txt

expected result:
pdf: 1
zip: 2
txt: 1

I made this query, but I got an error.

"aggs": {
    "uniqueTerms": {
        "terms": {
            "field": "filetype"
        }
    },
    "aggs": {
        "count": {
            "cardinality": {
                "field": "filetype"
            }
        }
    }
}

如何查询以获得结果？

索引映射已更新:

"file" : {
    "properties" : {
        "filetype" : {
            "type" : "string",
            "norms" : {
                "enabled" : false
            },
            "fields" : {
                  "raw" : {
                      "type" : "string",
                      "index" : "not_analyzed",
                      "ignore_above" : 256
                  }
              }
          }
      }
}

Answer 1

好的开始，您快到了。您只需要将cardinality聚合嵌套更深一层。

{
  "aggs": {
    "uniqueTerms": {
      "terms": {
        "field": "filetype"
      },
      "aggs": {
        "count": {
          "cardinality": {
            "field": "filetype"
          }
        }
      }
    }
  }
}