apply_form_for_options!

# File actionview/lib/action_view/helpers/form_helper.rb, line 457
      def apply_form_for_options!(record, object, options) #:nodoc:
        object = convert_to_model(object)

        as = options[:as]
        namespace = options[:namespace]
        action, method = object.respond_to?(:persisted?) && object.persisted? ? [:edit, :patch] : [:new, :post]
        options[:html].reverse_merge!(
          class:  as ? "#{action}_#{as}" : dom_class(object, action),
          id:     (as ? [namespace, action, as] : [namespace, dom_id(object, action)]).compact.join("_").presence,
          method: method
        )

        options[:url] ||= if options.key?(:format)
          polymorphic_path(record, format: options.delete(:format))
        else
          polymorphic_path(record, {})
        end
      end