The document outlines the agenda for Day 4 of a Ruby on Rails course focusing on routing, controllers, and views. It discusses general routing rules, naming routes, and controller actions, as well as providing tips for using Rails generators and managing user sessions. The content includes technical details about RESTful routes, strong parameters, and handling different types of requests.

1. Ruby on rails
course
By @AlSayedGamal

2. Views and
Controllers
Day 4

3. Agenda
Routing
Controllers and nested controllers
Views and template engines

4. routing (routes.rb)
General rules
root 'pages#main'
get '/patients/:id', to:
‘patients#show’
match 'photos', to: 'photos#show',
via: [:get, :post]
resources and nested resources
url_for
member and collection

5. Resutful Routes
Note: the url helper methods

6. routing(routes.rb)
get ‘:controller/:action/:id/with_user/:user_id'
Naming routes (as:)
via: [get, post or all]
constraints: { subdomain: 'admin' }
can save your life
get 'books/*section/:title', to: ‘books#show'
mount AdminApp, at: ‘/admin’
get 'こんにちは', to: 'welcome#index'

7. Controller
Actions
before_action
layout
respond_to
head and status codes
render views
redirect_to with flash

8. Controller
(Params)
Hash, Array and JSON Parameters
GET /clients?ids[]=1&ids[]=2&ids[]=3
def default_url_options
{ locale: I18n.locale }
end
Strong paramaters

9. Controller
session, flash and cookies
request object
Send_data and send_file

10. Controllers
(Request Specials)
session, flash and cookies
request object
Send_data and send_file

11. add it to Gemfile and bundle
rails g devise users
rake db:migrate
Notice the before_action filter
Tip1: check “rails g”after installation.
Tip2: check user model after generation.

12. Thanks