在本地服务器上查看时，选项或Gem可以查看页面的控制器和视图吗？

is there an option or gem that will show me exactly which controller served which views to create the current page I'm looking at, as well as parameters and what not, in some sort of dev console. This would be really helpful for exploring more complex applications that I don't have experience with.is there an option or gem that will show me exa