ActionController::Metal is the simplest possible controller, providing a valid Rack interface without the additional niceties provided by ActionController::Base.| api.rubyonrails.org
Rails parameters let you access data sent by the browser, both via the URL and forms. In this article, we'll cover the basics of parameters, including what they are, how they work, and why they're important. We'll also learn how you can pass parameters in different formats such as arrays and hashes.| Write Software, Well