我试着在脚本评分函数中使用余弦相似性。当我试图测量相似性的文档中缺少稠密向量场时，查询就会中断。
我花了很多时间搜索如何检查该字段是否存在于文档中，但没有成功。
我试过：
正在检查文档['field\u name']==null
正在与doc['field\u name']检查。size（）==0
正在与doc['field\u name']检查。值==null
我使用的查询是

POST /sidx-4111c0fc-a8ba-523c-9851-34a2b803643b/_search/
{
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "must": {
            "multi_match": {
              "query": "nri customer bank loan",
              "fields": [],
              "fuzziness": "AUTO"
            }
          }
        }
      },
      "functions": [
        {
          "script_score": {
            "script": {
              "source": "double score =0; score = doc['dense_vector_field'] == null ?0: cosineSimilarity(params.qv, 'dense_vector_field'); if(score>=0.8 && score<=1.0){return 10000+score;} else if(score>=0.60 && score<0.80){return score+1000;} else{return score+100}",
              "params": {
                "qv": [1,1,0,1]
              }
            }
          }
        }
      ],
      "boost_mode": "sum"
    }
  }
}

我有以下错误

"caused_by" : {
            "type" : "illegal_argument_exception",
            "reason" : "No field found for [dense_vector_field] in mapping with types []"
          }
        }

有人能帮帮我吗