Ruby on Rails ActionController Parameters
Example
Controllers have access to HTTP parameters (you might know them as ?name=foo in URLs, but Ruby on Rails handle different formats too!) and output different responses based on them. There isn't a way to distinguish between GET and POST parameters, but you shouldn't do that in any case.
class UsersController < ApplicationController def index respond_to do |format| format.html do if params[:name] == "john" render html: "Hello John" else render html: "Hello someone" end end end end end As usual our route:
resources :users, only: [:index] Access the URL /users?name=john and the output will be Hello John, access /users?name=whatever and the output will be Hello someone
