elasticsearch - 在Groovy中动态访问JSON对象

Question

这是我需要发送给ElasticSearch的查询:

{
  "query": {
    "match_all":{}
  },
  "sort": {
    "_script": {
      "type":"number",
      "script": {
        "inline":"statusMap[status] || 0",
        "params": {
          "statusMap": {
            "CAN":5,
            "COM":4,
            "HLD":3,
            "PEN":2,
            "INP":1
          }
        }
      },
      "order":"desc"
    }
  }
}

其中status是字符串类型的字段。参数statusMap的值可能因查询而异，并且我认为我可以通过按原样指定映射值来解决，因为这仍然是有效的JavaScript。然后我意识到脚本不是JS，而是Groovy。

问题在于Groovy根本不喜欢statusMap[status]。这个JavaScript表达式在Groovy中是否等效？如果没有，有哪些替代方案？

编辑

错误消息是

{
   "error": {
      "root_cause": [
         {
            "type": "script_exception",
            "reason": "failed to run inline script [statusMap[status]] using lang [groovy]"
         }
      ],
      "type": "search_phase_execution_exception",
      "reason": "all shards failed",
      "phase": "query",
      "grouped": true,
      "failed_shards": [
         {
            "shard": 0,
            "index": "foo",
            "node": "8AcXwANfSd-HF-nyMXHDLw",
            "reason": {
               "type": "script_exception",
               "reason": "failed to run inline script [statusMap[status]] using lang [groovy]",
               "caused_by": {
                  "type": "missing_property_exception",
                  "reason": "No such property: status for class: 5ea995c6862849ebdbc5e3d4126d81302185a798"
               }
            }
         }
      ]
   },
   "status": 500
}

注意:将statusMap[status]更改为statusMap[doc.status.value]会产生null_pointer_exception错误消息。

Answer 1

您的内联脚本需要改成这样:

    "inline":"statusMap[doc.status.value] ?: 0",

还要确保您有enabled dynamic scripting。