Choose Your Battles and LetIt::REST. Hampton Catlin and Jeffrey Hardy

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1 Choose Your Battles and LetIt::REST Hampton Catlin and Jeffrey Hardy

3 Obligatory Resume 50 years of Rails experience PHDs from MIT Founded the Dharma Initiative

4 Invented Haml, Scribbish, Sass, ASCII, Ruby, Lisp, The DaVinci Code, Unicorns, Rainbows, Kittens, Cat Macros, Balloons, Prototype, Rails, Babies, Altoids, SQL, Religion, and Monkey Poop (not monkeys, though).

5 The Beauty of Resource-Based Controllers

6 class PostsController < ApplicationController def = Post.find(:all) respond_to do format format.html # index.rhtml format.xml { rer :xml } def = Post.find(params[:id]) respond_to do format format.html # show.rhtml format.xml { rer :xml } def = Post.new def = Post.find(params[:id]) def = Post.new(params[:post]) respond_to do format flash[:notice] = 'Posts was successfully created.' format.html { redirect_to post_url(@post) } format.xml { head :created, :location => post_url(@post) } else format.html { rer :action => "new" } format.xml { rer :xml } def = Post.find(params[:id]) respond_to do format flash[:notice] = 'Posts was successfully updated.' format.html { redirect_to post_url(@post) } format.xml { head :ok } else format.html { rer :action => "edit" } format.xml { rer :xml } def = respond_to do format format.html { redirect_to posts_url } format.xml { head :ok }

7 The Problem

8 The Goal

9 PRODUCTION No Shit!

10 Exceptions are Manageable

11 Action Pattern load resource object(s) optional preloads perform modifying action (CUD) respond

12 class PostsController < ApplicationController def = Post.find(:all) respond_to do format format.html # index.rhtml format.xml { rer :xml } def = Post.find(params[:id]) respond_to do format format.html # show.rhtml format.xml { rer :xml } def = Post.new def = Post.find(params[:id]) def = Post.new(params[:post]) respond_to do format flash[:notice] = 'Posts was successfully created.' format.html { redirect_to post_url(@post) } format.xml { head :created, :location => post_url(@post) } else format.html { rer :action => "new" } format.xml { rer :xml } def = Post.find(params[:id]) respond_to do format flash[:notice] = 'Posts was successfully updated.' format.html { redirect_to post_url(@post) } format.xml { head :ok } else format.html { rer :action => "edit" } format.xml { rer :xml } def = respond_to do format format.html { redirect_to posts_url } format.xml { head :ok }

13 class PostsController < ApplicationController make_resourceful do build :all

14 class CommentsController < ApplicationController make_resourceful do build :create, :destroy

15 map.resources :posts, :has_many => :comments

16 class CommentsController < ApplicationController make_resourceful do build :create, :destroy belongs_to :post

17 Association Proxy (our saviour)

18 Post.find(params[:post_id]).comments.find(:all) Post.find(params[:post_id]).comments.find(params[:id]) Post.find(params[:post_id]).comments.find(params[:id]).update_attributes(params[:comment]) Post.find(params[:post_id]).comments.find(params[:id]).destroy Post.find(params[:post_id]).comments.build(params[:comment]) Post.find(params[:post_id]).comments.build(params[:comment]).save notice something?

19 current_model

20 Comment.belongs_to :user

21 current_user

22 class CommentsController < ApplicationController make_resourceful do build :create, :destroy belongs_to :post associate_with :current_user

23 More Helpers

24 def current_param params[:id] def current_object current_model.find(current_param) def current_objects current_model.find(:all) def load_object current_object)

25 Callbacks

26 class PostsController < ApplicationController make_resourceful do build :all before :show = "Awesome"

27 class PostsController < ApplicationController make_resourceful do build :all before :show = "Awesome" response_for :show do format format.html { redirect_to current_object } response_for :update do redirect_to root_url

28 No Blocking

29 Encourages Phat Models

30 Experimental: Publish

31 class PostsController < ApplicationController make_resourceful do build :all #... publish :formats => [:xml, :yaml, :json], :only => :show, :attributes => [:title, :body, { :comments => :body }]

32 super alpha (but we re using it in production)

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