elasticsearch - 避免在 Elasticsearch 结果中重复

Question

我有以下数据，我想避免结果中重复练习区名称。如何在 flex 搜索结果中避免重复。请寄给我解决方案。

Array
(
    [0] => Array
        (
            [_index] => vendors
            [_type] => practiceareas
            [_id] => 240
            [_score] => 
            [_source] => Array
                (
                    [practice_area_id] => 237
                    [id] => 240
                    [practice_area_name] => Anemia
                    [practice_area_image] => 
                    [created_date] => 2016-07-04 14:51:46
                    [status] => 1
                    [industry_id] => 9
                    [category_id] => 14
                    [vendors_count] => 26
                    [services_count] => 0
                    [products_count] => 0
                )

            [sort] => Array
                (
                    [0] => 26
                )

        )

    [1] => Array
        (
            [_index] => vendors
            [_type] => practiceareas
            [_id] => 582
            [_score] => 
            [_source] => Array
                (
                    [practice_area_id] => 364
                    [id] => 582
                    [practice_area_name] => Joint Pains
                    [practice_area_image] => 
                    [created_date] => 2016-07-04 14:51:47
                    [status] => 1
                    [industry_id] => 9
                    [category_id] => 12
                    [vendors_count] => 26
                    [services_count] => 0
                    [products_count] => 0
                )

            [sort] => Array
                (
                    [0] => 26
                )

        )

    [2] => Array
        (
            [_index] => vendors
            [_type] => practiceareas
            [_id] => 1315
            [_score] => 
            [_source] => Array
                (
                    [practice_area_id] => 237
                    [id] => 1315
                    [practice_area_name] => Anemia
                    [practice_area_image] => 
                    [created_date] => 2016-07-04 14:51:46
                    [status] => 1
                    [industry_id] => 9
                    [category_id] => 15
                    [vendors_count] => 26
                    [services_count] => 0
                    [products_count] => 0
                )

            [sort] => Array
                (
                    [0] => 26
                )

        )
)

谢谢。

Answer 1

您可能想使用Field Collapsing来显示按特定字段分组的搜索结果。按名称分组意味着需要术语聚合。

为了能够对“practice_area_name”进行分组，该字段应以其原始not_analyzed形式可用。否则，您应该对“practice_area_id”进行分组以避免not_analyzed字段。

"aggs": {
    "vendors": {
      "terms": {
        "field":   "practice_area_name"
      },
      "aggs": {
        "dedup_docs": { "top_hits": { "size": 1 }}  
      }
    }
  }

注意:top_score聚合按每个存储区中得分最高的文档对用户聚合中的术语进行排序。