根據特定的 uniqueid 字段在 elasticsearch 中獲取聚合計數

Question

我已經創建了一個索引並在 elasticsearch 中為文檔編制了索引，它工作正常，但這里的挑戰是我必須根據我在下面給出的示例文檔中的 uniqueid 來獲取類別字段的聚合計數。

{
"UserID":"A1001",
"Category":"initiated",
"policyno":"5221"
},
{
"UserID":"A1001",
"Category":"pending",
"policyno":"5222"
},
{
"UserID":"A1001",
"Category":"pending",
"policyno":"5223"
},
{
"UserID":"A1002",
"Category":"completed",
"policyno":"5224"
}



**Sample output for UserID - "A1001"**

initiated-1
pending-2

**Sample output for UserID - "A1002"**
completed-1

如何從上面給定的 Json 文檔中獲取聚合計數，例如上面提到的示例輸出

Answer 1

我建議使用術語聚合，如下所示：

{
"size": 0,
"aggs": {
    "By_ID": {
    "terms": {
        "field": "UserID.keyword"
    },
    "aggs": {
        "By_Category": {
        "terms": {
            "field": "Category.keyword"
        }
        }
    }
    }
}
}

以下是回復的片段：

    "hits" : {
    "total" : {
    "value" : 4,
    "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [ ]
},
"aggregations" : {
    "By_ID" : {
    "doc_count_error_upper_bound" : 0,
    "sum_other_doc_count" : 0,
    "buckets" : [
        {
        "key" : "A1001",
        "doc_count" : 3,
        "By_Category" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
            {
                "key" : "pending",
                "doc_count" : 2
            },
            {
                "key" : "initiated",
                "doc_count" : 1
            }
            ]
        }
        },
        {
        "key" : "A1002",
        "doc_count" : 1,
        "By_Category" : {
            "doc_count_error_upper_bound" : 0,
            "sum_other_doc_count" : 0,
            "buckets" : [
            {
                "key" : "completed",
                "doc_count" : 1
            }
            ]
        }
        }
    ]
    }
}