Building Web Apps with Rails
Hello
What about you?
The Course
Hello Ruby!
Hello Rails
Try Ruby!
Http://tryruby.org
Stop when you see "summary 4" or stuff
about file operations.
Skip to challenge on Classes.
Ruby, Ruby, Ruby
● Everything is an object
● Chain methods to your heart's content
● Bang! Or no bang?
● Hashes and :symbols
● Key value pairs :key => 'value'
● Blocks { } / do end
● @instance variables
A Ruby Class
Our app: FirstFM
FirstFM
StationsUsers StationLists
FirstFM
StationsUsers StationLists
Let's get going
rails new firstfm
rails generate scaffold Station name:string description:text url:string
cd firstfm
rake db:migrate
rails server
What? How did this happen?
Rails has generated
● Application defaults, files and settings
● A model to represent the 'Station' entity
● A database table to store stations
● A controller to respond to requests
● Views to show them
Rails has generated
● Application defaults, files and settings
● A model to represent the 'Station' entity
● A database table to store stations
● A controller to respond to requests
● Views to show them
rails new firstfm
Rails has generated
● Application defaults, files and settings
● A model to represent the 'Station' entity
● A database table to store stations
● A controller to respond to requests
● Views to show them
rails generate scaffold Station name:string description:text url:string
Rails has generated
● Application defaults, files and settings
● A model to represent the 'Station' entity
● A database table to store stations
● A controller to respond to requests
● Views to show them
rake db:migrate
EVERYONE IS ENTITLED TO MY
OPINION
EVERYONE IS ENTITLED TO MY
OPINION
Convention over
Configuration
EVERYONE IS ENTITLED TO MY
OPINION
Convention over
Configuration(Not loved by all...)
How does it work?
In your app directory, navigate to: db/migrate/
rake db:migrate
The Station Migration
The Station Model
The Stations Controller
● Create – new, create
● Read – index, show
● Update – edit, update
● Destroy - destroy
CRUD actions in the controller
# GET /stations/1 # GET /stations/1.json def show @station = Station.find(params[:id])
respond_to do |format| format.html # show.html.erb format.json { render json: @station } end end
The 'Show' Action (Controller)
The 'Show' Action (View)
Action / View name convention
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