[custom_score]中START_OBJECT的未知密钥

Question

我正在尝试使用以下查询在多匹配查询上创建自定义得分：

GET /product/_search
{
  "custom_score": {
    "query": {
      "bool": {
        "must": {
          "multi_match" : {
            "query":    "casual shirt", 
            "type": "best_fields",
            "fields": [ "brandTitle^15", "title^10", "details^5" ],
            "tie_breaker": 1,
            "fuzziness": "AUTO"
          }
        },
        "filter": {
          "term": {
            "inStock": true
          }
        }
      }
    },
    "params": {
        "scoreWeighting": 2,
        "popularityWeighting": 5
    },
    "script": "scoreWeighting * _score + popularityWeighting * doc['popularity'].value"
  }
}

我尝试将参数，脚本和查询字段移动到不同的位置，以查看顺序在这里是否很重要（我假设不是，因为它是JSON对象）。该文档似乎也具有与我相似的语法： https://www.elastic.co/guide/en/elasticsearch/reference/0.90/query-dsl-custom-score-query.html，但我仍然没有运气。

我收到的错误是：

"Unknown key for a START_OBJECT in [custom_score]."

Answer 1

根据以下内容，看来custom_score已被弃用：

https://www.elastic.co/guide/en/elasticsearch/reference/0.90/query-dsl-custom-score-query.html

使用function_score_query或script_score这样的工具是正确的工具：

https://www.elastic.co/guide/en/elasticsearch/reference/0.90/query-dsl-function-score-query.html

此外，如果不建议过时，则custom_score必须位于查询中。