Elasticsearch创建联接字段(Node.js) [英] Elasticsearch create join field (Nodejs)

问题描述

我有以下文档:

 导出类CustomerServiceResultType {id:字符串;正文:{customerRelation:string};}出口类别CustomerType {id:字符串;正文:{name:string};} 

我希望 CustomerServiceResultType 与 CustomerType 具有以下字段的关系: customerRelation .

这是我的映射:

 等待this.elasticsearchService.indices.putMapping({"index":"db"，"type":"CustomerServiceResultType"，身体":{属性":{"customerRelation":{"type":"join"，关系":{"CustomerServiceResultType":"CustomerType"}}}}}); 

这是我得到的错误:

  [嵌套] 421512-11/21/2020，6:40:42 PM [ExceptionsHandler]非法参数异常+ 96414msResponseError:非法参​​数_异常 

没有关于此错误的详细信息...

谢谢

解决方案

您的请求本身没有问题-我认为它只需要一个额外的选项: include_type_name:true .

它是 <代码在Node.js中默认为> undefined ，但此处.

这应该可以解决问题:

 等待client.indices.putMapping({include_type_name:是，索引:"db"，类型:"CustomerServiceResultType"，身体 : {特性: {客户关系: {类型:"join"，关系:{CustomerServiceResultType:"CustomerType"}}}}}); 

键入的索引将在8.x中删除，因此最好的方法实际上是:

 等待client.indices.putMapping({索引:"db"，身体 : {特性: {客户关系: {类型:"join"，关系:{CustomerServiceResultType:"CustomerType"}}}}}); 

顺便说一句:您的打字稿类型在这里并没有真正发挥作用，因为ES是仅JSON的接口，并且ES弃用了 type 方面，但这两个概念相距甚远.

I have the following docs:

export class CustomerServiceResultType{
  id: string;
  body:{customerRelation: string};
}

export class CustomerType{
  id: string;
  body:{name: string};
}

I want CustomerServiceResultType to have a relation to CustomerType with the field: customerRelation.

this is my mapping:

await this.elasticsearchService.indices.putMapping({
  "index": "db",
  "type": "CustomerServiceResultType",
  "body" : {
      "properties": {
        "customerRelation": {
          "type": "join",
          "relations": {
            "CustomerServiceResultType": "CustomerType"
          }
      }
    }
  }
});

This is the error I get:

[Nest] 421512   - 11/21/2020, 6:40:42 PM   [ExceptionsHandler] illegal_argument_exception +96414ms
ResponseError: illegal_argument_exception

There are no details about this error...

Thanks

解决方案

There's nothing wrong with your request per-se -- I think it just requires one extra option: include_type_name: true.

It's undefined by default in nodejs but is required in ES 7.x on the server side. More reasoning behind this is here.

So this should do the trick:

await client.indices.putMapping({
  include_type_name: true,
  index: "db",
  type: "CustomerServiceResultType",
  body : {
      properties: {
        customerRelation: {
          type: "join",
          relations: {
            CustomerServiceResultType: "CustomerType"
          }
      }
    }
  }
});

Typed indexes will be removed in 8.x so the best approach would actually be:

await client.indices.putMapping({
  index: "db",
  body : {
      properties: {
        customerRelation: {
          type: "join",
          relations: {
            CustomerServiceResultType: "CustomerType"
          }
      }
    }
  }
});

BTW: your typescript types don't really play a role here because ES is a JSON-only interface and while there's the deprecated type aspect to ES, the two concepts are very distant.

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