Resource and view
1 like1,109 views
The document provides information about Rails 3.0 including that it combines Merb and Rails 2.3. It discusses features like Bundler, Rack, HTML5, and Arel. It also covers REST, using resources, and responding to different formats. Views, layouts, partials, helpers, caching and expiration are described.
![Rails 3.0
• Merb + Rails 2.3 = Rails 3.0
users
.where(users[:name].eq('nucc'))
• Bundler
.project(users[:id])
# => SELECT users.id FROM users WHERE users.name = 'nucc'
• Rack
users.where(users[:name].eq('bob')).where(users[:age].lt(25))
#•=> SELECT * FROM users where users.name=’bob’ and users.age < 25
HTML 5
• Arel
users.where(users[:name].eq('bob').or(users[:age].lt(25)))
# => SELECT * FROM users where users.name=’bob’ or users.age < 25
valid_users = users.where(users[:valid].eq(1))
men = valid_users.where(users[:sex].eq(1))
women = valid_users.where(users[:sex].eq(2))
number_of_women = women.count()](https://image.slidesharecdn.com/resourceandview-101014133217-phpapp01/85/Resource-and-view-3-320.jpg)
![Configuration
/app/models/product.rb /app/controllers/products_controller.rb
class Product < ActiveRecord::Base class Products < ApplicationController
end
def index
@products = Product.all
end
def show
@product = Product.find params[:id]
end
config/routes.rb def update
...
Meetup::Application.routes.draw do |map|
end
resources :products
...
end
end](https://image.slidesharecdn.com/resourceandview-101014133217-phpapp01/85/Resource-and-view-8-320.jpg)
Resource and view
- 1. Fitting for the occasion MeetUP @ Balabit October 14, 2010 nucc@balabit.com
- 2. Rails 3.0 • Merb + Rails 2.3 = Rails 3.0 • Bundler • Rack • HTML 5 • Arel
- 3. Rails 3.0 • Merb + Rails 2.3 = Rails 3.0 users .where(users[:name].eq('nucc')) • Bundler .project(users[:id]) # => SELECT users.id FROM users WHERE users.name = 'nucc' • Rack users.where(users[:name].eq('bob')).where(users[:age].lt(25)) #•=> SELECT * FROM users where users.name=’bob’ and users.age < 25 HTML 5 • Arel users.where(users[:name].eq('bob').or(users[:age].lt(25))) # => SELECT * FROM users where users.name=’bob’ or users.age < 25 valid_users = users.where(users[:valid].eq(1)) men = valid_users.where(users[:sex].eq(1)) women = valid_users.where(users[:sex].eq(2)) number_of_women = women.count()
- 4. Sharing information Product Products Model Controller
- 5. Sharing information Product Products Model Controller
- 6. REST • Representational State Transfer • Roy Fielding - 2000 • SOAP is a protocol, REST is an architecture • Representation of a resource • iWiW, Facebook, GitHub, Twitter, Google Search
- 7. REST Mapping Verb Path Action GET /products index GET /products/:id show POST /products create GET /products/:id/edit edit PUT /products/:id update DELETE /products/:id delete
- 8. Configuration /app/models/product.rb /app/controllers/products_controller.rb class Product < ActiveRecord::Base class Products < ApplicationController end def index @products = Product.all end def show @product = Product.find params[:id] end config/routes.rb def update ... Meetup::Application.routes.draw do |map| end resources :products ... end end
- 9. Using resource /app/models/user.rb class User < ActiveResource::Base site.url = “http://api.twitter.com” end /app/controller/user_controller.rb class UserController < ActionController::Base self.site = “http://api.twitter.com” self.element_name = “user” self.proxy = “...” self.timeout = 5 self.ssl_options = { :key => “...” } end
- 10. Fitting for the occasion Product Product Model Controller
- 11. Fitting for the occasion HTTP Product Product Model Controller Android UI / XML iPhone UI / XML XML JSON
- 12. Respond to class ProductsController < Application def index @products = Product.all respond_to do |format| format.html # index.html.erb format.iphone # index.iphone.erb format.json { render :json => @products } format.xml { render :xml => @products} end end end
- 13. Fitting for the occasion Product /products.html Product Model Controller /products.xml /products.iphone /products.rss /products.js
- 14. Review /app/models /app/controllers /app/views /app/helpers
- 15. Rendering render :xml => @products render :json => @products render :file => “../owners/owner.html.erb” render :text => “Hello World” render :update do |page| page.replace_html(“products”, :partial => product, :object=> @product) end
- 16. Views Layout :header content index.html.erb :menu product #1 product #2 product #3 :footer
- 17. Layout # layout.html.erb # index.html.erb <html> <body> <%= content_for :header do %> <div class=”header”> <span> BALABIT Products </span> <%= yield :header %> <% end %> </div> <div class=”content”> <%= content_for :menu do %> <div class=”menu”> <li>Special menu item</li> <%= yield :menu %> <% end %> </div> </div> <div class=”products”> <div class=”content”> ... <%= yield %> </div> </div> ...
- 18. Partial /app/views/products/index.html.erb content #object render :partial => “product”, :object => ... product #1 #array render :partial => “product”, :collection => ... product #2 product #3 /app/views/products/_product.html.erb
- 19. Partial # /app/views/products/index.html.erb <div class=”products”> <%= render :partial => “product”, :collection => @products %> /app/views/products/index.html.erb </div> content # /app/views/products/_product.html.erb #object <div class=”product”> <span class=”title”><%= product.name %></span> => render :partial => “product”, :object ... product #1 <span class=”owner”><%= product.owner %></span> </div>#array render :partial => “product”, :collection => ... product #2 # result <div class=”products”> <div class=”product”> product #3 <span class=”title”>SCB</span> <span class=”owner”>Marci</span> </div> </div> /app/views/products/_product.html.erb
- 20. Helpers /app/views/products/index.html.erb /app/helpers/products_helper.rb <div> module ProductsHelper <span> Number of products: </span> <%= number_of_products(@product) %> def number_of_products( products ) <div> products.select{ |p| p.active? }.size end <% form_for @product, :remote => true do | f | %> <%= f.text_field :version %> end <% end %>
- 21. Cache class ProductController < Application class ProductController < Application before_filter :authentication caches_page :index caches_action :index def index def index @products = Product.all @products = Product.all end end def create def create expire_page :action => :index expire_page :action => :index ... ... end end ... ... end end
- 22. Cache <html> <body> <% cache do %> <div class=”menu”> <li>Show products</li> </div> <% end %> <% cache(:action => 'update', :action_suffix => 'products') do %> <div class=”products”> <%= render :partial => “product”, :collection => @products %> </div> <% end %> # expire_fragment( :controller => ‘products’, :action => 'index', :action_suffix => 'products')
- 23. Questions?
- 24. Thank you!