new

# File activerecord/lib/active_record/reflection.rb, line 415
      def initialize(name, scope, options, active_record)
        super
        @type = -(options[:foreign_type]&.to_s || "#{options[:as]}_type") if options[:as]
        @foreign_type = -(options[:foreign_type]&.to_s || "#{name}_type") if options[:polymorphic]
        @constructable = calculate_constructable(macro, options)

        if options[:class_name] && options[:class_name].class == Class
          raise ArgumentError, "A class was passed to `:class_name` but we are expecting a string."
        end
      end