Advanced RESTful Rails

Advanced RESTful Rails
Ben Scoﬁeld

Shall I compare thee to a summer's day?
Thou art more lovely and more temperate.
Rough winds do shake the darling buds of May,
And summer's lease hath all too short a date.
Sometime too hot the eye of heaven shines,
And often is his gold complexion dimm'd;
And every fair from fair some time declines,
By chance, or nature's changing course, untrimm'd;
But thy eternal summer shall not fade
...

app
controllers
helpers
models
views
config
environments
initializers
db
doc
lib
tasks
log
public
images
javascripts
stylesheets
script
performance
process
test
fixtures
functional
integration
unit
...

exists app/models/
exists app/controllers/
exists app/helpers/
create app/views/users
exists test/functional/
exists test/unit/
dependency model
exists app/models/
exists test/unit/
exists test/fixtures/
create app/models/user.rb
create test/unit/user_test.rb
create test/fixtures/users.yml
create db/migrate
create db/migrate/20080531002035_create_users.rb
create app/controllers/users_controller.rb
create test/functional/users_controller_test.rb
create app/helpers/users_helper.rb
route map.resources :users

Audience Participation!
who is building restful applications?

class UsersController < ApplicationController
# ...

def activate
self.current_user = params[:activation_code].blank? ? false : # ...
if logged_in? && !current_user.active?
current_user.activate!
flash[:notice] = quot;Signup complete!quot;
end
redirect_back_or_default('/')
end

def suspend
@user.suspend!
redirect_to users_path
end

def unsuspend
@user.unsuspend!
end

def destroy
@user.delete!
end

def purge
@user.destroy

Restful Authentication
end
end

Resources

hey-helen - ﬂickr

Addressability

memestate - ﬂickr

Representations

stevedave - ﬂickr

Stateless*

http://www1.ncdc.noaa.gov/pub/data/images/usa-avhrr.gif

why care?

Domain

ejpphoto - ﬂickr

Modeled

kerim - ﬂickr

ActionController::Routing::Routes.draw do |map|
map.releases 'releases/:year/:month/:day',
:controller => 'items', :action => 'index'
end

class ItemsController < ApplicationController
# release listing page; filters on year/month/day from params
def index; end
end

map.resources :issues
end

class IssuesController < ApplicationController
# issue detail page
def show; end
end

map.resources :titles
end

class TitlesController < ApplicationController
# title detail page
def show; end
end

map.resources :titles, :has_many => [:issues]
end

class IssuesController < ApplicationController
# issue listing page; could be series page
def index; end
end

map.resources :users
end

before_filter :require_login, :only => [:edit, :update]

# edit account
def edit; end

# update account
def update; end
end

end

# public view - pull list
def show; end
end

map.resources :users, :has_many => [:titles]
end

class TitlesController < ApplicationController
# public view - pull list, given a user_id
def index; end
end

map.resource :session
end

class SessionsController < ApplicationController
# login form
def new; end

# login action
def create; end

# logout action
def destroy; end
end

Homepage seandreilinger - ﬂickr

map.resource :homepage
map.root :homepage
end

class HomepagesController < ApplicationController
# homepage
def show; end
end

map.resources :contents
map.root :controller => ‘contents’, :action => ‘show’,
:page => ‘homepage’
end

class ContentsController < ApplicationController
# static content
def show
# code to find a template named according to params[:page]
end
end

map.resources :ads
map.root :ads
end

class AdsController < ApplicationController
# ad index - the million dollar homepage
def index; end
end

map.resource :dashboard
end

class DashboardsController < ApplicationController
before_filter :require_login

# dashboard
def show; end
end

map.resources :instruments
end

class InstrumentsController < ApplicationController
before_filter :require_login

# dashboard
def index
@instruments = current_user.instruments
end
end

map.resources :posts, :has_one => [:preview]
end

class PreviewsController < ApplicationController
def create
@post = Post.find(params[:post_id])
@post.attributes = params[:post]

render :template => 'posts/show'
end
end

map.resources :posts
map.resource :preview
end

class PreviewsController < ApplicationController
def create
@post = Post.new(params[:post])

render :template => 'posts/show'
end
end

Search seandreilinger - ﬂickr

map.resources :posts
end

class PostsController < ApplicationController
def index
if params[:query].blank?
@posts = Post.find(:all)
else
@posts = Post.find_for_query(params[:query])
end
end
end

map.resource :search
end

class SearchesController < ApplicationController
def show
@results = Searcher.find(params[:query])
end
end

Wizards dunechaser - ﬂickr

ActionController::Routing::Routes.draw do |map| map.resources :galleries
map.resources :galleries
map.resources :restaurants, :has_many => [:photos]

map.with_options :controller => 'photos' do |p|
p.edit_restaurant_photos 'restaurants/:restaurant_id/photos/edit',
:action => 'edit'
p.update_restaurant_photos 'restaurants/:restaurant_id/photos/update',
:action => 'update',
:conditions => {:method => :put}
end
end

Collections wooandy - ﬂickr

Web Services josefstuefer - ﬂickr

Staff Directory

Inventory
Search Application Text
RESTful API
HR

etc.

RESTful API Staff Directory

RESTful API Inventory
Search Application Text
RESTful API HR

RESTful API etc.

this slide left intentionally blank

Administration

map.namespace :admin do |admin|
admin.resources :invitations
admin.resources :emails
admin.resources :users
admin.resources :features
end
end

what gives you ﬁts?

<%= link_to 'Delete', record, :method => 'delete',
:confirm => 'Are you sure?' %>

<a href=quot;/records/1quot; onclick=quot;if (confirm('Are you sure?')) { var f =
document.createElement('form'); f.style.display = 'none';
this.parentNode.appendChild(f); f.method = 'POST'; f.action = this.href;var m =
document.createElement('input'); m.setAttribute('type', 'hidden');
m.setAttribute('name', '_method'); m.setAttribute('value', 'delete');
f.appendChild(m);f.submit(); };return false;quot;>Delete</a>

Accessibility

map.users 'users', :controller => ‘users’, :action => ‘index’
map.users 'users', :controller => ‘users’, :action => ‘create’
end

Hand-Written Routes


# Install the default route as the lowest priority.
map.connect ':controller/:action/:id'
end

Default Routing

map.resources :records
end

class RecordsController < ApplicationController
def index; end

def show; end

# ...
end

Mixed

map.resource :record_list
map.resources :records
end

class RecordListsController < ApplicationController
def show; end

# ...
end

class RecordsController < ApplicationController
def show; end

# ...
end

Separated

where’s rails bitten you?

Thanks!
ben scoﬁeld
ben.scoﬁeld@viget.com
http://www.viget.com/extend
http://www.culann.com

Advanced RESTful Rails

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