class Elasticsearch::DSL::Search::Aggregations::ReverseNested

A single-bucket aggregation which allows to aggregate on “parent” documents from the nested documents

@example

search do
  aggregation :offers do
    nested do
      path 'offers'
      aggregation :top_categories do
        reverse_nested do
          aggregation :top_category_per_offer do
            terms field: 'category'
          end
        end
      end
    end
  end
end

See the integration test for a full example.

@see www.elastic.co/guide/en/elasticsearch/guide/current/nested-aggregation.html