new

# File activerecord/lib/active_record/reflection.rb, line 428
      def initialize(name, scope, options, active_record)
        super
        @type         = options[:as] && (options[:foreign_type] || "#{options[:as]}_type")
        @foreign_type = options[:polymorphic] && (options[:foreign_type] || "#{name}_type")
        @constructable = calculate_constructable(macro, options)
        @association_scope_cache = Concurrent::Map.new

        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