discourse/app/serializers/grouped_search_result_serializer.rb

class GroupedSearchResultSerializer < ApplicationSerializer
  has_many :posts, serializer: SearchPostSerializer
  has_many :users, serializer: SearchResultUserSerializer
  has_many :categories, serializer: BasicCategorySerializer
  attributes :more_posts, :more_users, :more_categories, :term, :search_log_id

  def search_log_id
    object.search_log_id
  end

end