javascript - 如何从MSearch返回数组匹配

Question

我有一个Elasticsearch集群，我正在针对多个索引(msearch)运行搜索，该搜索返回一个对象数组(每个要查询的索引一个对象)。这些对象中的每一个在hits对象内部都有一个hits数组。我真的只是在_source对象之后。您将如何获取所有嵌套的“_source”对象的数组？

[
  {
    "hits": {
      "hits": [
        {
          "_index": "index1",
          "_type": "type1",
          "_id": "1",
          "_score": 12.163426,
          "_source": {
            "somekey": "some value",
            "someotherkey": "another value"
          }
        }
      ]
    },
  },
  {
    "hits": {
      "hits": []
    },
  },
  {
    "hits": {
      "hits": [
        {
          "_index": "index2",
          "_type": "type2",
          "_id": "2",
          "_score": 7.0380797,
          "_source": {
            "somekey": "some value",
            "someotherkey": "another value"
          }
        },
        {
          "_index": "index2",
          "_type": "type2",
          "_id": "3",
          "_score": 6.07253,
          "_source": {
            "somekey": "some value 2",
            "someotherkey": "another value 2"
          }
        }
      ]
    },
  },
]

Answer 1

您可以使用 Array.prototype.flatMap() 遍历外部数组，并使用 Array.prototype.map() 将hits.hits转换为_source属性数组作为项:

const src = [{"hits":{"hits":[{"_index":"index1","_type":"type1","_id":"1","_score":12.163426,"_source":{"somekey":"some value","someotherkey":"another value"}}]},},{"hits":{"hits":[]},},{"hits":{"hits":[{"_index":"index2","_type":"type2","_id":"2","_score":7.0380797,"_source":{"somekey":"some value1","someotherkey":"another value1"}},{"_index":"index2","_type":"type2","_id":"3","_score":6.07253,"_source":{"somekey":"some value 2","someotherkey":"another value 2"}}]},},],

result = src.flatMap(o => o.hits.hits.map(({_source}) => _source))

console.log(result)

.as-console-wrapper{min-height:100%;}