Ruby on Rails - parameters in ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails



  • 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 we 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
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As usual our route:

resources :users, only: [:index]
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Access the URL /users?name=john and the output will be Hello John, access /users?name=whatever and the output will be Hello someone


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