# File lib/active_record/associations.rb, line 1029
      def belongs_to(association_id, options = {})
        reflection = create_belongs_to_reflection(association_id, options)

        if reflection.options[:polymorphic]
          association_accessor_methods(reflection, BelongsToPolymorphicAssociation)
        else
          association_accessor_methods(reflection, BelongsToAssociation)
          association_constructor_method(:build,  reflection, BelongsToAssociation)
          association_constructor_method(:create, reflection, BelongsToAssociation)
        end

        add_counter_cache_callbacks(reflection)          if options[:counter_cache]
        add_touch_callbacks(reflection, options[:touch]) if options[:touch]

        configure_dependency_for_belongs_to(reflection)
      end