如何從ElasticSearch響應中刪除多余的字段

Question

嗨，我是ElasticSearch的新手，我正努力從ElasticSearch的響應中刪除所有多余的字段。 請參見以下回復：

  "report": {
    "unique_users": {
      "doc_count_error_upper_bound": 0,
      "sum_other_doc_count": 0,
      "buckets": [
        {
          "key": 1234,
          "doc_count": 2,
          "user_details": {
            "hits": {
              "total": 2,
              "max_score": 1.4E-45,
              "hits": [
                {
                  "_index": "orders-test",
                  "_type": "order",
                  "_id": "2",
                  "_score": 0.0,
                  "_source": {
                    "customer_email": "reba_dickens@blick.name",
                    "customer_phone": "476.824.4998 x498",
                    "customer_name": "Mohammed Abernathy"
                  }
                }
              ]
            }
          }
        },
        {
          "key": 5678,
          "doc_count": 1,
          "user_details": {
            "hits": {
              "total": 1,
              "max_score": 1.4E-45,
              "hits": [
                {
                  "_index": "orders-test",
                  "_type": "order",
                  "_id": "1",
                  "_score": 0.0,
                  "_source": {
                    "customer_email": "yolanda.batz@ruel.biz",
                    "customer_phone": "1-715-183-8343 x026",
                    "customer_name": "Richie Tillman II"
                  }
                }
              ]
            }
          }
        }
      ]
    }
  }

在上方，您可以看到響應中還包含其他一些字段，例如_index，_type，_score，max_score等。我已經按照ElasticSearch response_filtering指南刪除了這些字段，但是對我來說不起作用。 我還已將filter_path參數傳遞給請求0.0.0.0:5000/v4/reports/user.json?filter_path=unique_users,unique_users.user_details.hits.hits._source，但沒有得到任何響應。 我正在使用以下功能來處理Elasticsearch查詢。

  def query(options = {})

    aggregations = {}

    buckets = {}
    buckets_for_unique_users buckets, aggregations
    buckets_for_new_users buckets, aggregations
    buckets_for_high_rollers buckets, aggregations

    filters = []
    filters << time_filter(options)
    filters << restaurant_filter(options) if options[:restaurant_id]
    filters << channel_filter(options) if options[:channel_id]

    query = {
      query: { bool: { filter: filters } },
      aggregations: buckets
    }
    query
  end

任何人都可以讓我知道我做錯了什么。

Answer 1

在請求中使用“ _source”和所需的屬性。 這將幫助您僅獲取指定的字段。

https://www.elastic.co/guide/zh-CN/elasticsearch/reference/current/search-request-source-filtering.html