searchkick_repro.rb

require "bundler/inline"

gemfile do
  source "https://rubygems.org"

  gem "activerecord", require: "active_record"
  gem "activejob", require: "active_job"
  gem "sqlite3"
  gem "searchkick", git: "https://github.com/ankane/searchkick.git"
end

puts "Searchkick version: #{Searchkick::VERSION}"
puts "Elasticsearch version: #{Searchkick.server_version}"

ActiveRecord::Base.establish_connection adapter: "sqlite3", database: ":memory:"
ActiveJob::Base.queue_adapter = :inline

ActiveRecord::Migration.create_table :products do |t|
  t.string :name
end

ActiveRecord::Migration.create_table :product_components do |t|
  t.string :name
  t.float :price
  t.integer :product_id
end

class ProductComponent < ActiveRecord::Base
  belongs_to :product
end

class Product < ActiveRecord::Base
  searchkick

  scope :search_import, -> { joins(:product_components).group('products.id').select('products.*, sum(product_components.price) as total_price') }
  
  has_many :product_components
  
  def search_data
    {
      total_price: total_price
    } 
  end
end

Product.reindex
product = Product.create!(name: "Test")
component1 = ProductComponent.create!(name: "C1", price: 10, product: product)
component2 = ProductComponent.create!(name: "C2", price: 20, product: product)

Product.search_index.refresh
response = Product.search("test").response

# Is it possible to get to `total_price` in response items?