创建弹性搜索查询，按类别随机显示5个问题

Question

我有字段类别

我的要求是针对下面提到的3个类别，我需要通过编写弹性搜索查询来标记问题（因此我希望查询中的类别和问题字段）

类别：

OLA

BNA公司

DRG公司

获取logstash-sdc-反馈/_search？{"_source"：["Category.keyword"]，"大小"：5，"查询"：{"bool"：{"必须": [ {"匹配"：{"Category.keyword"："OLA"，"BNA"，"DRG"}}

]，

}}，"aggs"：{"MyBuckets"：{"条款"：{"field"："questions.keyword"，"Category.keyword""order"：{"_count"："asc"}，"size"："5"

} } } }

Answer 1

您可以使用术语查询和术语聚合来实现您的用例。

添加工作示例

指数数据：

{
  "category": "XYZ",
  "question": "d"
}
{
  "category": "OLA",
  "question": "a"
}
{
  "category": "BNA",
  "question": "b"
}
{
  "category": "DRG",
  "question": "c"
}

搜索查询：

{
  "query": {
    "bool": {
      "must": {
        "terms": {
          "category.keyword": [
            "OLA",
            "BNA",
            "DRG"
          ]
        }
      }
    }
  },
  "aggs": {
    "top_tags": {
      "terms": {
        "field": "category.keyword"
      },
      "aggs": {
        "top_faq_hits": {
          "top_hits": {
            "_source": {
              "includes": [
                "question"
              ]
            },
            "size": 1
          }
        }
      }
    }
  }
}

搜索结果：

"aggregations": {
    "top_tags": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": "BNA",                 // note this
          "doc_count": 1,
          "top_faq_hits": {
            "hits": {
              "total": {
                "value": 1,
                "relation": "eq"
              },
              "max_score": 1.0,
              "hits": [
                {
                  "_index": "65566020",
                  "_type": "_doc",
                  "_id": "2",
                  "_score": 1.0,
                  "_source": {
                    "question": "b"            // note this
                  }
                }
              ]
            }
          }
        },
        {
          "key": "DRG",
          "doc_count": 1,
          "top_faq_hits": {
            "hits": {
              "total": {
                "value": 1,
                "relation": "eq"
              },
              "max_score": 1.0,
              "hits": [
                {
                  "_index": "65566020",
                  "_type": "_doc",
                  "_id": "3",
                  "_score": 1.0,
                  "_source": {
                    "question": "c"
                  }
                }
              ]
            }
          }
        },
        {
          "key": "OLA",
          "doc_count": 1,
          "top_faq_hits": {
            "hits": {
              "total": {
                "value": 1,
                "relation": "eq"
              },
              "max_score": 1.0,
              "hits": [
                {
                  "_index": "65566020",
                  "_type": "_doc",
                  "_id": "1",
                  "_score": 1.0,
                  "_source": {
                    "question": "a"
                  }
                }
              ]
            }
          }
        }
      ]
    }
  }