# File lib/action_view/helpers/url_helper.rb, line 76 def url_for(options = {}) options ||= {} url = case options when String escape = true options when Hash options = { :only_path => options[:host].nil? }.update(options.symbolize_keys) escape = options.key?(:escape) ? options.delete(:escape) : true @controller.send(:url_for, options) when :back escape = false @controller.request.env["HTTP_REFERER"] || 'javascript:history.back()' else escape = false polymorphic_path(options) end escape ? escape_once(url) : url end