Replicas and multiple indices

class Book < ActiveRecord::Base
  attr_protected

  include AlgoliaSearch

  algoliasearch(per_environment: true) do
    searchableAttributes [:name, :author, :editor]

    # Define a replica index to search by `author` only
    add_replica("Book_by_author", per_environment: true) do
      searchableAttributes [:author]
    end

    # define a replica index with custom ordering but same settings than the main block
    add_replica("Book_custom_order", inherit: true, per_environment: true) do
      customRanking ["asc(rank)"]
    end
  end

end

class Student < ActiveRecord::Base
  attr_protected

  include AlgoliaSearch

  algoliasearch(index_name: "people", id: :algolia_id) do
    # [...]
  end

  private
  def algolia_id
    # ensure the teacher & student IDs are not conflicting
    "student_#{id}"
  end
end

class Teacher < ActiveRecord::Base
  attr_protected

  include AlgoliaSearch

  algoliasearch(index_name: "people", id: :algolia_id) do
    # [...]
  end

  private
  def algolia_id
    # ensure the teacher & student IDs are not conflicting
    "teacher_#{id}"
  end
end

class Book < ActiveRecord::Base
  attr_protected

  include AlgoliaSearch

  PUBLIC_INDEX_NAME = "Book_#{Rails.env}"
  SECURED_INDEX_NAME = "SecuredBook_#{Rails.env}"

  # store all books in index 'SECURED_INDEX_NAME'
  algoliasearch(index_name: SECURED_INDEX_NAME) do
    searchableAttributes [:name, :author]
    # convert security to tags
    tags do
      [released ? "public" : "private", premium ? "premium" : "standard"]
    end

    # store all 'public' (released and not premium) books in index 'PUBLIC_INDEX_NAME'
    add_index(PUBLIC_INDEX_NAME, if: :public?) do
      searchableAttributes [:name, :author]
    end
  end

  private
  def public?
    released && !premium
  end

end