无法在 Elasticsearch 中执行聚合

Question

我是 Elasticsearch 的新手，一直在使用它的高级 Rest 客户端来执行日期范围的聚合。当我运行代码时，查询成功执行但返回的对象具有 null 作为聚合值：

这就是我正在尝试的方式：

AggregationBuilder aggregation =
    AggregationBuilders
        .dateRange("agg")
        .field("date_created")
        .format("MM")
        .addRange(11, 12) // from 11 to 12 (excluded)

SearchRequest searchRequest = new SearchRequest("index_name");
searchRequest.types(Long.toString(1234));
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder
        .query(QueryBuilders.matchAllQuery())
        .aggregation(aggregation);

SearchResponse searchResponse = this.client.search(searchRequest);

searchResponse 对象的聚合为空值。

但是当我在 Kibana 中运行聚合查询时，这就是我得到的

POST /index_name/1234/_search?size=0
{
    "aggs": {
        "range": {
            "date_range": {
                "field": "date_created",
                "format": "MM",
                "ranges": [
                    { "from": "now-0M/M" } 
                ]
            }
        }
    }
}

输出：

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 0,
    "hits": []
  },
  "aggregations": {
    "range": {
      "buckets": [
        {
          "key": "11-*",
          "from": 1509494400000,
          "from_as_string": "11",
          "doc_count": 2
        }
      ]
    }
  }
}

有人可以帮我解决这个问题吗？我有点卡住了很长时间。

根据要求添加示例数据：

"hits": [
      {
        "_index": "index_name",
        "_type": "1234",
        "_id": "AV__ZmN6KNpjod2Y_7PE",
        "_score": 1,
        "_source": {
          "category": 1234,
          "i_id": 87665,
          "v_Id": 12,
          "date_created": "2017-11-27T14:33:38.954Z"
        }
      },
      {
        "_index": "index_name",
        "_type": "1234",
        "_id": "AV_-XzlpzSX1UeitwVjd",
        "_score": 1,
        "_source": {
          "category": 1234,
          "i_id": 8766,
          "v_Id": 2,
          "date_created": "2017-11-27T09:46:00.095Z"
        }
      }
    ]

谢谢！

Answer 1

终于，我找到了问题的答案。创建聚合对象后，我们必须手动将其设置为 SearchRequest。

AggregationBuilder aggregation =
    AggregationBuilders
        .dateRange("agg")
        .field("date_created")
        .format("yyyy-MM")
        .addRange("2017-11", "2017-12") // from 11 to 12 (excluded)

SearchRequest searchRequest = new SearchRequest("index_name");
searchRequest.types(Long.toString(1234));
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder
        .aggregation(aggregation);

添加行来修复代码：

searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = this.client.search(searchRequest);

无法在 Elasticsearch 中执行聚合

Not able to Perform Aggregation in Elasticsearch

elasticsearch

elasticsearch-aggregation