ruby on rails workshop
Post on 21-Jan-2018
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Ruby on RailsYos Riady yosriady.com
Today’s Agenda
● Intro to Ruby (40 minutes)● Rails (120 minutes)● QA (20 minutes)
Introduction
rubyonrails.orgruby-lang.org
Built On Rails
Ruby Language
codecademy.com/en/tracks/ruby
● Variables● Conditionals ● Loops + Iterators● Blocks● Data Structures● Classes
Creating a New Rails Application
rails new myapp
cd myapp
bundle install
rails server
MVC Architecture
Building a Static Siterails generate controller Pages home
Now try and visit ‘/pages/home’.
What do you see?
Building a Static Site
Try adding a few more pages on your own.
Remember, for each page:● Add a new route in routes.rb● Add a new action in PagesController.rb● Add a view .erb file
Building a Static Site
Try adding the following in your action:def home
@now = Time.now
end
In your home.html.erb file, add: <%= @now %>
Building a Dynamic SiteAt the core, most database driven web sites are the same. They need to store records and provide a way to do the following:● Create new records in the database● Read or show the records in the database● Update existing records● Destroy or delete records
Because these 4 actions are so common, Rails includes the scaffold command to make creating them easier.
rails generate scaffold Confession title:string body:text
REST
Let’s add comments to our application!
Users can create Comments for a Confession, and have it visible under the Confession entry.
How do we do this?
Building a Dynamic Site
What do we need?● A new Comment model● A new controller for Comments
○ A ‘create’ action to save new Comments to the DB● A new route in routes.rb for
‘comments#create’● A view form for users to write a Comment
Building a Dynamic Site
Building a Dynamic Site
Hands-On
Learning Resources● http://tryruby.org/● http://guides.rubyonrails.org/● http://docs.railsbridge.org/intro-to-rails/● http://rails-4-0.railstutorial.org● http://www.codecademy.com/learn/learn-rails
Q&AYos Riady yosriady.com
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