javascript - 如何获取elasticsearch索引中的特定文档

Question

我想获取对应特定字段的所有数据，并得到elasticsearch的响应。

{
"took": 2,
"timed_out": false,
"_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
},
"hits": {
    "total": {
        "value": 35,
        "relation": "eq"
    },
    "max_score": 0.44183275,
    "hits": [
        {
            "_index": "allevents",
            "_type": "_doc",
            "_id": "jQPDaG0BcOh3oggcguoV",
            "_score": 0.44183275,
            "_source": {
                "category": "sessions",
                 "contentid": "KqRLj2lWZ3",
                "clientname": "omkarpathlab",
------------------
}]

我尝试了搜索功能，但它返回了错误。

var elasticsearch = require('elasticsearch');
var client = new elasticsearch.Client({
    host: 'aaa',
    log: 'trace',
    apiVersion: '7.1'
});

client.search({
    "size": 20,
    "query": {
        "query_string": {
        "default_field": "clientname",
        "query": "omkarlab"
        }
    }
     }).then((res) => {
        console.log("resultData", res);
    }, (err) => {
        console.log("err", err);
    });
enter code here

错误显示:

{ Error: [illegal_argument_exception] request [/_search] contains unrecognized parameter: [query]

请建议我如何解决此类问题。

Answer 1

您应该在 default_field 下指定您的字段，而不是您要查找的值。在您的情况下，您尝试查询的字段是 clientname，您要查找的值是 omkarpathlab。因此您的查询应如下所示:

"query": {
    "query_string": {
    "default_field": "clientname",
    "query": "omkarpathlab"
    }
}

编辑。但是您在 body 属性内的查询:

client.search({
  "size": 20,
  "body": {
    "query": {
      "query_string": {
        "default_field": "clientname",
        "query": "omkarlab"
      }
    }
  }
}).then((res) => {
  console.log("resultData", res);
}, (err) => {
  console.log("err", err);
});