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EMBER on RAILS: #REALTALK

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OR, RELUCTANTLY STUMBLING UPON THE FUTURE OF WEB DEVELOPMENT

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BRANDON HAYS @TEHVIKING RUBYIST.

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THAT’S NO MOON

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DIDN’T USED TO PROGRAM BUT THAT’S ANOTHER STORY

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(NOT) MY STORY

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“BRENDAN”

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“OH BOY, RAILS! THAT’S WHERE I’M A VIKING!”

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source 'https://rubygems.org' gem 'architecture' gem 'design' gem 'domain_logic' gem 'agile_development' gem 'ship_it' THERE’S A GEM FOR THAT

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BRENDAN HAS OPINIONS

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WEB PAGE == DOCUMENT KEEP DEV SIMPLE MAKE IT SNAPPY FOCUS ON USERS

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CHURCH OF THE 80% USE CASE

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MVC

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WE WORK IN 2 LANGUAGES & 2 ENVIRONMENTS

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MVCMVC

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VCMVCMVCMV VCMVCMVCMV VCMVCMVCMV VCMVCMVCMV BOYZ2MENABCBBD

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No content

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“HATER” IS A STRONG WORD

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THING IS, THERE’S THIS PROBLEM.

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:*(

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WE GET OUR NEWS FROM TWITTER

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- Browse tweets - Display story inline - Readability integration - Filter tweet types - Mark as read - Filter read/unread - J/K Navigation

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SOPHISTICATED UI + PERSISTENT STATE = PAIN

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DOM/AJAX/CONTROLLER BACK & FORTH DANCE

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FEELS KINDA... DIRTY

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JQUERY CASCADE: PLUGIN 1 THAT WAS EASY PLUGIN 2 THAT WAS... LESS EASY PLUGIN 3 OH THE HUMANITY

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2 CHOICES: COMPROMISE ON USER EXPERIENCE

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NOBODY PUTS UX IN THE CORNER 2 CHOICES:

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2 CHOICES: WRITE THE BALL OF MUD

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BALL OF MUD: WHAT DOES IT LOOK LIKE?

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THE DOM IS YOUR PERSISTENCE LAYER NOW.

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2 CHOICES: PRAY IT HOLDS TOGETHER

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THIS WAS SUPPOSED TO BE FUN

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3rd CHOICE: LEAN ON JS FRAMEWORK

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CAN BRENDAN EVER BE HAPPY USING A JS FRAMEWORK?

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JS FRAMEWORK PROLIFERATION

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IT’S WORTH A SHOT, RIGHT?

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Gemfile gem 'ember-rails' gem 'ember-source', '1.0.0.rc6' from command line: rails g ember:bootstrap oh, and SHUT OFF TURBOLINKS INSTALLATION

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THIS IS A GEM INSTALL I KNOW THIS

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CHALLENGES

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I WAS TOLD THERE WOULD BE SPRINKLES

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BUT BRENDAN SOLDIERS ON

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HOW IT WORKS app/controllers/home_controller.rb class HomeController < ApplicationController def index end end config/routes.rb match "/*path" => "home#index", via: %w(get post) root "home#index"

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HOW IT WORKS app/assets/javascripts/router.js.coffee App.Router.map -> @route 'home', path: '/' app/assets/javascripts/templates/application.handlebars HELLO THERE BIG BEAUTIFUL WORLD! {{outlet}} WE’LL TALK ABOUT {{OUTLET}} IN A MOMENT

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BREAK SOME RAILS HABITS

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MODELS ARE MOSTLY WHAT YOU EXPECT

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MODELS 2 JOBS: DEFINE AND HOLD PROPERTIES FOR DOMAIN MODEL INSTANCES RETRIEVE/PERSIST CHANGES IF USING EMBER-DATA OR EMBER-MODEL

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ROUTES AREN’T WHAT YOU EXPECT

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ROUTES APP_ROUTER.JS IS WHAT YOU KNOW AS "ROUTES" ROUTES DO HEAVY LIFTING. GETS YOUR MODEL OBJECT, STUFFS IT INTO A CONTROLLER, AND PASSES IT ALONG

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CONTROLLERS AREN’T WHAT YOU EXPECT

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CONTROLLERS NOT AT ALL LIKE RAILS CONTROLLERS. PURELY FOR ADDING DISPLAY LOGIC TO THE MODEL

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VIEWS AREN’T WHAT YOU EXPECT

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VIEWS VIEWS != TEMPLATES VIEWS IN RAILS ARE INVISIBLE, THEY PASS CONTEXT TO TEMPLATES VIEWS IN EMBER ARE OPTIONAL, FOR HANDLING USER INPUT & DISPLAY LOGIC

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TEMPLATES HANDLEBARS IS POWERFUL HANDLEBARS HELPERS ARE AWESOME, USE THEM {{ELSE}} FOR ZERO STATE IS SO GREAT

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http://jeffreybiles.com/blog/much-very-confused.html

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(MORE) CHALLENGES

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connectOutlets: function(router, event) { router.get('sidebarController').connectOutlet('sidebar'); router.get('contentController').connectOutlet('content'); router.get('footerController').connectOutlet('footer'); } STACK OVERFLOW

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connectOutlets: function(router, event) { router.get('sidebarController').connectOutlet('sidebar'); router.get('contentController').connectOutlet('content'); router.get('footerController').connectOutlet('footer'); } STACK OVERFLOW WHAT?

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EMBER-DATA

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EMBER-DATA WH... WHAT?

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KEEPING UP BETAS, RC1, RC2, RC3, RC4, RC5, RC6, RC6.2 EMBER-DATA BETAS HANDLEBARS BETAS

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KEEPING UP BETAS, RC1, RC2, RC3, RC4, RC5, RC6, RC6.2 EMBER-DATA BETAS HANDLEBARS BETAS W-WH... WHAT?

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SAY “WHAT” AGAIN I DOUBLE DARE YOU

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THINK RAILS 0.14.3, NOT RAILS 4 (OR EVEN 2.3)

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OK, GREAT. NOW WHAT?

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app/assets/javascripts/routes.js.coffee App.Router.map -> @resource 'sharedItems', path: '/', -> @resource 'sharedItem', path: '/:shared_item_id' @route "fourOhFoured", path: "*:" App.Router.reopen location: 'history' DIVING IN: EMBER

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app/assets/javascripts/routes/shared_items.js.coffee App.SharedItemsRoute = Ember.Route.extend model: -> App.SharedItem.find() setupController: (controller, model) -> controller.set('content', model) DIVING IN: EMBER

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app/assets/javascripts/templates/shared_items.handlebars {{#each item in model}}
  • {{#linkTo 'sharedItem' item}}{{item.id}}{{/linkTo}} li> {{else}} No items. {{/each}} {{outlet}} DIVING IN: EMBER
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    app/assets/javascripts/templates/shared_item.handlebars

    Shared item goes here!

    {{url}}

    DIVING IN: EMBER

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    app/controllers/shared_items_controller.rb module Api class SharedItemsController < ApplicationController respond_to :json def index @shared_items = current_user.shared_items.all respond_with @shared_items, root: false end def show @shared_item = current_user.shared_items.find(params[:id]) respond_with @shared_item, root: false end def update @shared_item = current_user.shared_items.find(params[:id]) if @shared_item.update!(shared_item_params) respond_with @shared_item, root: false end end private def shared_item_params params.require(:shared_item).permit(:read_state) end end end API: IT’S JUST RAILS

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    IT WILL MAKE YOU FOCUS LESS ON PERSISTENCE

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    app/models/readable_item.rb class ReadableItem attr_accessor :content, :title, :author, :url def initialize(url) @url = url get_readable_content end def get_readable_content request = HTTParty.get("http:// foo.readability.com/") readability_response = request.parsed_response self.content = readability_response["content"] self.title = readability_response["title"] self.author = readability_response["author"] end end NON-PERSISTED MODELS

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    SharedItemsRoute: ‘/’ rendered into application {{outlet}} ApplicationRoute (generated): ‘/’ SharedItemRoute: ‘/:id’ rendered into shared_items {{outlet}}

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    TWEETLINKS v1.0rc6.2b4 DEMO

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    WHAT WE HAVEN’T DONE COMPLEX UI TWITTER AUTH ANY SEMBLANCE OF REAL-LIFE USE

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    WHAT WE HAVE DONE DEFINE DOMAIN MODEL URL DESIGN DEFINE API NEEDS STUFF ON THE SCREEN!

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    NOW WHAT? WASN'T READY

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    NOW WHAT? IS READY NOW

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    HARD PROBLEMS: DATA. AUTHENTICATION.

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    HARD PROBLEMS: DATA. AUTHENTICATION. CLOSING DIV TAGS.

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    app/assets/javascripts/models/shared_item.js.coffee App.SharedItem = Ember.Model.extend id: Ember.attr() twitter_username: Ember.attr() url: Ember.attr() tweet_body: Ember.attr() shared_at: Ember.attr() sharer_avatar_url: Ember.attr() App.SharedItem.url = "/api/shared_items" App.SharedItem.adapter = Ember.RESTAdapter.create() SOLUTION: DATA EMBER-MODEL

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    app/assets/javascripts/models/shared_item.js.coffee App.SharedItem.find() # Array: shared_items#index App.SharedItem.find(3) # Object: shared_items#show sharedThingy.save() # Object: shared_items#create/update ‘FRINSTANCE: App.SharedItemRoute = App.AuthenticatedRoute.extend model: (params) -> App.SharedItem.find(params.shared_item_id) SOLUTION: DATA EMBER-MODEL

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    app/views/layouts/application.html.erb App.set('token', ‘<%= logged_in? ? token : '' %>'); SOLUTION: AUTH ASYNC ROUTES

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    app/assets/javascripts/routes/authenticated_route.js.coffee App.AuthenticatedRoute = Ember.Route.extend beforeModel: -> if !App.get('token').length @transitionTo('landing') SOLUTION: AUTH ASYNC ROUTES

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    app/assets/javascripts/routes/shared_items_route.js.coffee App.SharedItemsRoute = App.AuthenticatedRoute.extend model: -> App.SharedItem.find() SOLUTION: AUTH ASYNC ROUTES

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    THAT’S WHEN BRENDAN FOUND THE TREASURE CHEST

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    A BACK-BREAKINGLY HUGE, HEAVY TREASURE CHEST

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    IMPERATIVE PROGRAMMING WHAT YOU WANT HOW TO DO IT

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    DECLARATIVE PROGRAMMING WHAT YOU WANT HOW TO DO IT

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    DECLARATIVE PROGRAMMING

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    FRP: WHAT IT IS DECLARATIVE PROGRAMMING

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    No content

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    “PLEASE, DON’T GIVE ANOTHER TALK ABOUT WHY COMPUTED PROPERTIES ARE GREAT”

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    COMPUTED PROPERTIES ARE GREAT

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    COMPUTED PROPERTIES DEMO

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    PROFESSOR GENKI'S SUPER ETHICAL REALITY BONUS SECTION

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    SELECT FOR

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    RUBY IS LOVE

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    JAVASCRIPT IS PARTY

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    MEET PEOPLE

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    TWEETLINKS: FASTER AND CLEANER

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    A NOTE ON TESTING

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    TDD ENCOURAGED MORE DOCS COMING SOON

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    FUNCTIONAL REACTIVE PROGRAMMING

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    FRP RESOURCES BACON.JS http://joefiorini.com/posts/implementing-a-functional-reactive-search-ui-with-baconjs FRAPPUCCINO https://github.com/steveklabnik/frappuccino

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    DROPS EMBER INTO APP LEAVES PROJECT* *NOT ACTUALLY A SCUMBAG, BASICALLY MADE THIS TALK EVEN POSSIBLE

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    ASK HIM TO PAIR CARRIES APP OVER FINISH LINE

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    PLEASE NO QUESTIONS

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    PLEASE NO QUESTIONS J/K LOL

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    RESOURCES Ember.js tutorial screencast by Tom Dale http://emberjs.com/guides/ Much Very Confused: Explaining client-side MVC for the server-side dev http://jeffreybiles.com/blog/much-very-confused.html ember-rails https://github.com/emberjs/ember-rails Pure CSS Framework http://purecss.io/ Tuts+ Let's Learn Ember (FREE!) http://freecourses.tutsplus.com/lets-learn-ember/

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    CREDITS http://www.flickr.com/photos/clevercupcakes/3024650837/ http://www.flickr.com/photos/davidyuweb/6978854146 http://www.flickr.com/photos/davidyuweb/6038463502 http://commons.wikimedia.org/wiki/File:Yukihiro_Matsumoto_EuRuKo_2011.jpg Rainbow Dash Laughs http://browse.deviantart.com/art/Rainbow-Dash-laughs-260209582