如何在主对象和嵌套对象数组的弹性中进行 multi_match 搜索？

Question

我正在使用 elastic-search v7，并且我已经映射了如下所示的对象。 项其嵌套的对象数组。

我的问题是，当我尝试按 multi_match 项目字段搜索时，它没有像我预期的那样工作，结果为空。但是当我尝试使用查询和布尔值进行搜索时，它会找到我的文档。

我不正确理解那里有什么不同，我如何理解 query_search 用于过滤和聚合数据的精确匹配，以及 multi_match 用于全文搜索和自动完成，对吧？

以及如何在根字段和嵌套字段中查找文档？

{
  "orders" : {
    "aliases" : { },
    "mappings" : {
      "properties" : {
        "amazonOrderId" : {
          "type" : "keyword"
        },
        "carrierCode" : {
          "type" : "text"
        },
        "carrierName" : {
          "type" : "text"
        },
        "id" : {
          "type" : "keyword"
        },
        "items" : {
          "type" : "nested",
          "properties" : {
            "amazonItemId" : {
              "type" : "keyword"
            },
            "amazonPrice" : {
              "type" : "integer"
            },
            "amazonQuantity" : {
              "type" : "integer"
            },
            "amazonSku" : {
              "type" : "keyword"
            },
            "graingerItem" : {
              "type" : "nested"
            },
            "graingerOrderId" : {
              "type" : "keyword"
            },
            "graingerPrice" : {
              "type" : "integer"
            },
            "graingerShipDate" : {
              "type" : "date"
            },
            "graingerShipMethod" : {
              "type" : "short"
            },
            "graingerTrackingNumber" : {
              "type" : "keyword"
            },
            "graingerWebNumber" : {
              "type" : "keyword"
            },
            "id" : {
              "type" : "keyword"
            }
          }
        }
     }
   }
 }
}

多重匹配请求

GET orders/_search
{
  "query":{
    "multi_match" : {
      "query": "4.48 - 1 pack - 4.48",
      "fields": [
          "items.amazonSku",
          "carrierCode",
          "recipientName"
        ]
    }
  }
}

通过 _explain api 调试返回给我的描述

"explanation" : {
    "value" : 0.0,
    "description" : "Failure to meet condition(s) of required/prohibited clause(s)",
    "details" : [
      {
        "value" : 0.0,
        "description" : "no match on required clause (items.amazonSku:4.48 - 1 pack - 4.48)",
        "details" : [
          {
            "value" : 0.0,
            "description" : "no matching term",
            "details" : [ ]
          }
        ]
      },
      {
        "value" : 0.0,
        "description" : "match on required clause, product of:",
        "details" : [
          {
            "value" : 0.0,
            "description" : "# clause",
            "details" : [ ]
          },
          {
            "value" : 1.0,
            "description" : "DocValuesFieldExistsQuery [field=_primary_term]",
            "details" : [ ]
          }
        ]
      }
    ]
  }

查询搜索

GET orders/_search
{
  "query": {
    "nested": {
      "path": "items",
      "query": {
        "bool": {
          "must": [
            { "match": { "items.amazonSku": "4.48 - 1 pack - 4.48"}}
          ]
        }
      }
    }
  }
}

Answer 1

由于您正在查询嵌套字段 items，因此您需要在查询中包含 nested 参数，以便它搜索嵌套字段对象

将您的搜索修改为

{
  "query": {
    "nested": {
      "path": "items",
      "query": {
        "multi_match": {
          "query": "4.48 - 1 pack - 4.48",
          "fields": [
            "items.amazonSku"
          ]
        }
      }
    }
  }
}