檔案沒有欄位的值！使用doc[<field>].size()==0檢查檔案是否缺少欄位

當我運行以下查詢時：

GET /annotations/_search
{
  "query": {
    "match_all": {}
  }
}

我收到以下回復：

{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "annotations",
        "_type" : "_doc",
        "_id" : "I9nlA",
        "_score" : 1.0,
        "_source" : {
          "preferences" : {
            "id" : 1,
            "annotation_id" : "I9nlA",
            "answer_timer" : 24
          }
         // other fields here
        }
      },
      {
        "_index" : "annotations",
        "_type" : "_doc",
        "_id" : "XIP6L",
        "_score" : 1.0,
        "_source" : {
          "id" : "XIP6L",
          "preferences" : {
            "id" : 2,
            "annotation_id" : "XIP6L",
            "answer_timer" : 5
          },
        // other fields here
        }
      }
    ]
  }
}

如您所見，該欄位Preferences沒有空值。我的問題是，當我根據該Preferences欄位添加腳本欄位時，它會引發錯誤。查詢：

GET /annotations/_search
{
  "query": {
    "match_all": {}
  },
  "script_fields": {
    "can_answer": {
      "script": {
        "source": """
          if (doc['creator_id'].value == params['user_id']){
            return true;
          }
          else{
            String nowString = params['now'];
            ZonedDateTime now = ZonedDateTime.parse(nowString);
            ZonedDateTime created = doc['created'].value;
            ZonedDateTime createdPlusAnswerTimer = created.plusHours(
              doc['preferences.answer_timer'].value
            );
            Duration d = Duration.between(now, createdPlusAnswerTimer);
            return d.toHours() > 0;
            }
        """,
        "params": {
          "user_id": 1,
          "now": "2022-05-17T16:17:49.366Z"
        }
      }
    }
  }
}

錯誤：

{
  "error" : {
    "root_cause" : [
      {
        "type" : "script_exception",
        "reason" : "runtime error",
        "script_stack" : [
          "org.elasticsearch.index.fielddata.ScriptDocValues.throwIfEmpty(ScriptDocValues.java:73)",
          "org.elasticsearch.index.fielddata.ScriptDocValues$Longs.get(ScriptDocValues.java:118)",
          "org.elasticsearch.index.fielddata.ScriptDocValues$Longs.getValue(ScriptDocValues.java:113)",
          "createdPlusAnswerTimer = created.plusHours(\n              doc['preferences.answer_timer'].value\n            );\n            Duration ",
          "                                                                                         ^---- HERE"
        ],
        "script" : " ...",
        "lang" : "painless",
        "position" : {
          "offset" : 398,
          "start" : 309,
          "end" : 441
        }
      }
    ],
    "type" : "search_phase_execution_exception",
    "reason" : "all shards failed",
    "phase" : "query",
    "grouped" : true,
    "failed_shards" : [
      {
        "shard" : 0,
        "index" : "annotations",
        "node" : "_ljs4uLdR7eBjL8ioYLqAg",
        "reason" : {
          "type" : "script_exception",
          "reason" : "runtime error",
          "script_stack" : [
            "org.elasticsearch.index.fielddata.ScriptDocValues.throwIfEmpty(ScriptDocValues.java:73)",
            "org.elasticsearch.index.fielddata.ScriptDocValues$Longs.get(ScriptDocValues.java:118)",
            "org.elasticsearch.index.fielddata.ScriptDocValues$Longs.getValue(ScriptDocValues.java:113)",
            "createdPlusAnswerTimer = created.plusHours(\n              doc['preferences.answer_timer'].value\n            );\n            Duration ",
            "                                                                                         ^---- HERE"
          ],
          "script" : " ...",
          "lang" : "painless",
          "position" : {
            "offset" : 398,
            "start" : 309,
            "end" : 441
          },
          "caused_by" : {
            "type" : "illegal_state_exception",
            "reason" : "A document doesn't have a value for a field! Use doc[<field>].size()==0 to check if a document is missing a field!"
          }
        }
      }
    ]
  },
  "status" : 400
}

它說有一些問題doc['preferences.answer_timer'].value，但我不知道為什么。該欄位在所有檔案中都具有價值。

有什么問題，我該如何解決？謝謝。

更新：映射添加：

 {
  "annotations" : {
    "mappings" : {
      "properties" : {
        
        // other fields
        
        "preferences" : {
          "type" : "nested",
          "properties" : {
            "annotation_id" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "answer_timer" : {
              "type" : "long"
            },
            "id" : {
              "type" : "long"
            }
          }
        }
        
        // other fields
        
      }
    }
  }
}

注意 當我使用時params._source.preferences.answer_timer，它作業正常。但是在Elasticsearch檔案中，據說使用_source.field很慢，所以我不想使用它。

uj5u.com熱心網友回復：

由于該preferences欄位是嵌套的，我們需要在嵌套查詢的背景關系中呼叫腳本。父檔案沒有 doc_value 欄位 - 因此給出錯誤。參考：https ://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-nested-query.html

解決方案 1：preferences將型別更改為object而不是嵌套。
解決方案 2：在嵌套背景關系中使用查詢。

標籤：弹性搜索 木花 弹性搜索无痛

上一篇：拒絕后重新允許通過無線除錯安裝應用程式|安卓

下一篇：ElasticsearchILM-ELK