# File lib/thinking_sphinx/active_record/sql_source/template.rb, line 10
  def apply
    add_field class_column, :sphinx_internal_class_name

    add_attribute primary_key,  :sphinx_internal_id,    nil
    add_attribute class_column, :sphinx_internal_class, :string, :facet => true
    add_attribute '0',          :sphinx_deleted,        :integer
  end