如何在elasticsearch查询中获得3个随机搜索结果

Question

我的 elasticsearch 查询 returns 记录在 publishedDates 范围内：

{
  query : {
    bool: {
      filter: [

      ],
      must: {
        range: {
          publishedDate: {
            gte: "2018-11-01",
            lte: "2019-03-30"
          }
        }
      }
    }
  }
  from: 0,
  size: 3,
}

我每次发送此查询时都需要显示 3 个随机结果

elastic search documentation中提到我可以发送种子来获得随机结果：

按照文档进行操作后，我将查询更新为：

{
  "query" : {
    "bool": {
      "filter": [

      ],
      "must": {
        "range": {
          "publishedDate": {
            "gte": "2018-11-01",
            "lte": "2019-03-30"
          }
        }
      }
    },
    "function_score": {
      "functions": [
        {
          "random_score": {
            "seed": "123123123"
           }
        }
      ]
    }
  },
  "from": 0,
  "size": 3
}

但它不起作用（说查询格式错误），谁能建议如何将此查询更正为 return 3 个随机搜索结果。

Answer 1

如果您只需要返回随机结果，您可以将查询重组为类似于以下内容

{
  "query": {
    "function_score": {
      "query": {
        "range": {
          "publishedDate": {
            "gte": "2018-11-01",
            "lte": "2019-03-30"
          }
        }
      },
      "boost": "5",
      "random_score": {},
      "boost_mode": "multiply"
    }
  },
  "from": 0,
  "size": 3
}

修改自 elastic 文档 - https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html

如何在elasticsearch查询中获得3个随机搜索结果

How to get 3 random search results in elasticserch query

elasticsearch

aws-elasticsearch