Routing

Writing urls

config/routes.rb

Rails.application.routes.draw do
  get 'welcome/home', to: 'welcome#home'
  get 'welcome/about', to: 'welcome#about'
end

Creating controllers

create new file

app/controllers/welcome_controller.rb

class WelcomeController < ApplicationController
  def home

  end

  def about

  end
end

Creating a view

app/views/welcome/home.html.erb

<h1>Home Page</h1>
<%= link_to 'About', welcome_about_path %>

app/views/welcome/about.html.erb

<h1>About Page</h1>
<%= link_to 'Home', welcome_home_path %>

For to create link to a page, run rake routes command

Notice welcome_home in Prefix column. append _path to it. like this welcome_home_path

List all routs (All defined urls)

rake routes

Output

$ rake routes
       Prefix Verb URI Pattern              Controller#Action
welcome_home GET  /welcome/home(.:format)  welcome#home
welcome_about GET  /welcome/about(.:format) welcome#about

Creating index/landing page url

We will modify above example

config/routes.rb

Rails.application.routes.draw do
  root to: 'welcome#home'
  get 'about', to: 'welcome#about'
end

app/views/welcome/home.html.erb

<h1>Home Page</h1>
<%= link_to 'About', about_path %>

app/views/welcome/about.html.erb

<h1>About Page</h1>
<%= link_to 'Home', root_path %>