Elasticsearch 部分匹配邮寄地址和客户编号

Question

我正在尝试将搜索词与给定模式部分匹配以进行自动完成。我希望 customerNumber、AddressLine1 和 Zip 匹配以 419 开头的任何文档（因此 4191 应匹配客户编号 41915678、地址 4191 Board Street 和邮政编码 41912）

"mappings": {
    "companyName": {
        "type": "text"
    },
    "customerNumber": {
        "type": "long"
    }
    "address": {
        "addressLine1": {
            "type": "text"
        },
        "city": {
            "type": "text"
        },
        "state": {
            "type": "text"
        },
        "zip": {
            "type": "text"
        }
    }
}

有人对查询有一个巧妙的解决方案吗？最终我需要使用 NEST 客户端将此查询转换为 C#。

Answer 1

一个简单的方法是利用 completion suggester field type.

基本上，您可以通过在您的映射中添加一个completion field来修改您的映射，例如

  "suggest": {
    "type": "completion"
  },

但是，完成字段的默认分析器（即 simple analyzer）不索引数字，我们需要创建我们的自定义分析器来正确执行此操作：

PUT my-index
{
  "settings": {
    "analysis": {
      "analyzer": {
        "suggest_analyzer": {         <--- custom analyzer
          "type": "custom",
          "tokenizer": "classic",
          "filter": [
            "lowercase"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      ...,
      "suggest": {                    <--- the new completion field with the right analyzer
        "type": "completion",
        "analyzer": "suggest_analyzer"
      }
    }
  }
}

然后您只需在建议字段中添加您想要建议的所有值来填充索引，如下所示：

PUT my-index/_doc/1
{
  "address": {
    "addressLine1": "1234 Main Street",
    "zip": "34526"
  },
  "customerNumber": "41915678",
  "suggest": [
    "1234 Main Street",
    "34526",
    "41915678"
  ]
}
PUT my-index/_doc/2
{
  "address": {
    "addressLine1": "4191 Board Street",
    "zip": "45263"
  },
  "customerNumber": "45267742",
  "suggest": [
    "4191 Board Street",
    "45263",
    "45267742"
  ]
}
PUT my-index/_doc/3
{
  "address": {
    "addressLine1": "5662 4th Avenue",
    "zip": "41912"
  },
  "customerNumber": "24442561",
  "suggest": [
    "5662 4th Avenue",
    "41912",
    "24442561"
  ]
}

然后，您可以使用以下建议查询搜索 419：

POST my-index/_search
{
  "suggest": {
    "customer-suggest": {
      "prefix": "419",
      "completion": {
        "field": "suggest"
      }
    }
  }
}

您将获得所有三个文档，因为每个文档都有一个匹配 419

的字段

Elasticsearch 部分匹配邮寄地址和客户编号

Elasticsearch partial matching on postal address and customer number

elasticsearch

nest