按地理距离汇总的订单条款

Question

所以我这里有个问题。。。

我正在使用ruby gem与Elasticsearch进行通信

=> #<Chewy::SnippetPagesIndex::Query:0x007f911c6b1610
 @_collection=nil,
 @_fully_qualified_named_aggs={"chewy::snippetpagesindex"=>{"chewy::snippetpagesindex::snippetpage"=>{}}},
 @_indexes=[Chewy::SnippetPagesIndex],
 @_named_aggs={},
 @_request=nil,
 @_response=nil,
 @_results=nil,
 @_types=[],
 @criteria=
  #<Chewy::Query::Criteria:0x007f911c6b1458
   @aggregations=
    {:group_by=>{:terms=>{:field=>"seo_area.suburb.id", :order=>{:_count=>"asc"}}, :aggs=>{:by_top_hit=>{:top_hits=>{:size=>10}}}}},
   @facets={},
   @fields=[],
   @filters=
    [{:geo_distance=>{:distance=>"100km", "seo_area.suburb.coordinates"=>"-27.9836052, 153.3977354"}},
     {:bool=>
       {:must_not=>[{:terms=>{:id=>[1]}}, {:terms=>{"seo_area.suburb.id"=>[5559]}}],
        :must=>[{:term=>{:path_category=>"garden-services"}}, {:term=>{:status=>"active"}}, {:exists=>{:field=>"path_area"}}],
        :should=>[]}}],
   @options=
    {:query_mode=>:must,
     :filter_mode=>:and,
     :post_filter_mode=>:and,
     :preload=>
      {:scope=>
        #<Proc:0x007f911c6b1700@/Users/serviceseeking/Work/serviceseeking/engines/seo/app/concepts/seo/snippet_page/twins/search.rb:45 (lambda)>},
     :loaded_objects=>true},
   @post_filters=[],
   @queries=[],
   @request_options={},
   @scores=[],
   @script_fields={},
   @search_options={},
   @sort=[{:_geo_distance=>{"seo_area.suburb.coordinates"=>"-27.9836052, 153.3977354", :order=>"asc", :unit=>"km"}}],
   @suggest={},
   @types=[]>,
 @options={}>

我经过的是这个...

     aggs: {
        by_seo_area_suburb_id: {
          terms: {
            field: "seo_area.suburb.id",
            size: 10,
            order: { by_distance: "desc" }
          },
          aggs: {
            by_top_hit: {
              top_hits: { size: 10 }
            },
            by_distance: {
              geo_distance: {
                field: "seo_area.suburb.coordinates",
                origin: "52.3760, 4.894",
                ranges: [
                  { from: 0, to: 1 },
                  { from: 1, to: 2 }
                ]
              }
            }
          }
        }
      }

但我收到了这个错误。。。

[500] {"error":{"root_cause":[{"type":"aggregation_execution_exception","reason":"Invalid terms aggregation order path [by_distance]. Terms buckets can only be sorted on a sub-aggregator path that is built out of zero or more single-bucket aggregations within the path and a final single-bucket or a metrics aggregation at the path end."}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query","grouped":true,"failed_shards":[{"shard":0,"index":"snippet_pages","node":"srrlBssmSEGsqpZnPnOJmA","reason":{"type":"aggregation_execution_exception","reason":"Invalid terms aggregation order path [by_distance]. Terms buckets can only be sorted on a sub-aggregator path that is built out of zero or more single-bucket aggregations within the path and a final single-bucket or a metrics aggregation at the path end."}}]},"status":500}

简单地说。。。

术语桶只能在子聚合器路径上排序，该子聚合器路径由路径中的零个或多个单桶聚合和路径端的最终单桶或指标聚合构建。

有什么想法吗？

Answer 1

你有这样的水桶：

1-2

2-3

4-5

等等。这些不是具有自然顺序的单一值桶。这就是异常告诉你的。所以你需要一些东西来把它融化成单一值。

即使你可以点这个。你为什么要这么做？距离在1和2之间的所有对象都将具有相同的比较值，并且它们的顺序将未定义。如果足够让您知道哪个是0-1和1-2等等，只需改变聚合顺序即可。首先，计算距离并对术语进行分组。

总而言之，我认为您有一个用例，其中聚合不是您想要的，因为请考虑以下两个文档：

{ name: "peter", location: [0,0] }
{ name: "peter", location: [100,0] }

显然，两个彼得斯会在一个术语聚合中融合为一个。但它们有两个不同的位置，因此距离（几乎）总是不同的。那么，你如何按距离订购彼得斯呢？一旦聚合了一个字段，所有其他字段都或多或少地与之解耦，并且不能使用其他字段来实现这一点。

所以如果你想要这样的东西，你很可能必须通过正常的搜索。了解如何按距离对搜索进行排序：

https://www.elastic.co/guide/en/elasticsearch/guide/current/sorting-by-distance.html