Trailblazerの紹介

TokyuRuby会議09(http://regional.rubykaigi.org/tokyu09)、Trailblazer::Tokyo (http://connpass.com/event/20137/) にて発表

Transcript

1. Trailblazer
   Trailblazer
   @kbaba1001
   Powered by Rabbit 2.1.6 and COZMIXNG
   

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2. 自己紹介
   kbaba1001
   Ruby on Rails
   

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3. 最近
   Rails をやめたいという話をたまに
   聞く気がする
   

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4. Railsのあるある
   規模が大きくなるとメンテナンス
   がつらい
   

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5. つらみ
   Fat Model
   ビジネスロジックのある
   Controller
   カオス partial
   

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6. つらみ…
   default_scope
   nested_attributes_for
   validation を if オプションで切
   り替え
   Rails Engine 使う gem の拡張
   

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7. では Rails をやめるべきな
   のか?
   別の言語(Go、Scala、Elixir)
   別のFW(padrino、lotus)
   先駆者になる(Trailblazer)
   

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8. Trailblazer
   https://leanpub.com/trailblazer
   

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9. 何？
   A new architecture for Rails.
   

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10. A new architecture
    

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11. A Concept-Driven OOP
    Framework
    app
    ├── concepts
    │ ├── comment
    │ │ ├── views
    │ │ │ ├── show.haml
    │ │ │ ├── list.haml
    │ │ ├── assets
    │ │ │ ├── comment.css.sass
    │ │ ├── cell.rb
    │ │ ├── operation.rb
    │ │ ├── twin.rb
    

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12. Trailblazer の特徴
    ビジネスロジックをMVCから分
    離して concepts 以下にまとめ
    る
    MVCを疎結合にしてメンテナン
    ス性の向上する
    テストしやすくする
    

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13. MVC
    Modelにはassociationとscope
    だけ
    Viewはconcept毎にViewModel
    として分割
    ControllerにはHTTPエンドポイ
    ントとしてのロジックだけ
    

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14. ビジネスロジック
    CRUD
    validation/callback
    Viewのためのロジック
    Worker
    

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15. Model
    class Thing < ActiveRecord::Base
    has_many :comments, -> { order(created_at: :desc) }
    has_many :users, through: :authorships
    has_many :authorships
    scope :latest, lambda { all.limit(9).order("id DESC") }
    end
    

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16. Controller
    class ThingsController < ApplicationController
    def create
    run Thing::Create do |op|
    return redirect_to(thing_path op.model) # success.
    end
    render :new # re-render form.
    end
    

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17. View
    .comments
    = concept("comment/cell", collection: comments)
    

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18. Trailblazer
    Operation
    Cell
    

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19. Operation
    class Thing < ActiveRecord::Base
    class Create < Trailblazer::Operation
    include CRUD
    model Thing, :create
    contract do
    property :name
    property :description
    validates :name, presence: true
    validates :description, length: {in: 4..160}, allow_blank: true
    end
    def process(params)
    validate(params[:thing]) do |f|
    f.save
    end
    end
    end
    

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20. Controller
    class ThingsController < ApplicationController
    def create
    run Thing::Create do |op|
    return redirect_to(thing_path op.model) # success.
    end
    render :new # re-render form.
    end
    

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21. View
    普通のview
    cells
    

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22. cells
    ViewModel
    メソッドとassetsのあるpartial
    

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23. Viewからcellを呼び出す
    .comments
    = concept("comment/cell", collection: comments)
    

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24. cell
    # app/concepts/comment/cell.rb
    class Comment::Cell < Cell::Concept
    property :body
    property :author
    def show
    render
    end
    private
    def author_link
    link_to "#{author.email}", author
    end
    end
    

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25. cellのview
    # app/concepts/comment/views/show.erb
    %h3 New Comment
    %p= body
    %p= author_link
    

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26. テスト
    Operation、cellのテストを行うこ
    とでfeature、requestテストを減
    らす
    

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27. Operation Test
    it "persists valid" do
    thing = Thing::Create[
    thing: {
    name: "Rails",
    description: "Kickass web dev"
    }
    ].model
    thing.persisted?.must_equal true
    thing.name.must_equal "Rails"
    thing.description.must_equal "Kickass web dev"
    end
    

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28. Cell の Test
    class CommentCellTest < Cell::TestCase
    controller ThingsController
    it do
    html = concept("comment/cell")
    html = Capybara.string(html)
    comments = html.all(:css, ".comment")
    first = comments[0]
    comments[0].find(".header").must_have_content "hilz@trb.org"
    comments[0].find(".header time")["datetime"].must_match /\d\d-/
    

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29. その他
    callback
    worker
    json
    

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30. 詳しくは
    https://leanpub.com/trailblazer
    Powered by Rabbit 2.1.6 and COZMIXNG
    

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