Aggregation on Many to many relations activerecord

Question

I want to make ES aggregation on many to many activerecord model on rails but no way My model :

 class Foo <  ApplicationRecord
  searchkick
  def search_data
    {
        bar: bar
    }
  end
  has_many :bars
end

I have tried many solution but always get

{"active"=>{"doc_count_error_upper_bound"=>0, "sum_other_doc_count"=>0, "buckets"=>[]}}

Answer 1

The answer is add this :

 def search_data
    Attributes.merge(
      bar_names: bar.map(&:name)
    )
  end