PadrinoDecorator

Transcript

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3. app/views/posts/show.slim - if @post.image.present? = image_tag @post.image.url - else =

   image_tag ‘default.png’ ͜Μͳͷ͕ͲΜͲΜͲΜͲΜ૿͑ͯ͘Δ WJFX

4. models/post.rb class Post < ActiveRecord::Base def image_url if self.image.present? self.image.url

   else ‘default.png’ end end end app/views/posts/show.slim = image_tag @post.image_url NPEFM

5. models/post.rb class Post < ActiveRecord::Base def image_url if self.image.present? self.image.url

   else ‘default.png’ end end end app/views/posts/show.slim = image_tag @post.image_url 7JFX༻ͷϝιου͕ .PEFMʹೖ͍ͬͯΔ ΩϞ͍ NPEFM

6. )FMQFS app/helpers/posts_helper.rb StitchStitch::App.helpers do # ... end ɾϝιου໊ͷিಥΛؾʹ͢Δඞཁ͕͋Δ ɾ001ͬΆ͘ͳ͍

7. models/post.rb class Post < ActiveRecord::Base end app/controllers/posts_controller.rb SampleProject::App.controllers :posts do

   get :show, with: :id do post = Post.find(params[:id]) @post_decorator = PostDecorator.new(post) render ‘posts/show’ end end app/views/posts/show.slim - if @post_decorator.is_new_page? = image_tag @post_decorator.image app/decorators/posts_decorator.rb class PostDecorator attr_reader :post def initialize(post) @post = post end def image_url if self.image.present? self.image.url else ‘default.png’ end end end දࣔ༻ͷϩδοΫΛ
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8. spec/app/decorators/post_decorator_spec.rb require 'spec_helper' describe "PostDecorator" do it 'can construct a

   new instance' do post = create(:post) @post_decorator = PostDecorator.new(post, self) expect(@post_decorator.image_url).to eq ‘default.png’ end end ςετ΋ॻ͖΍͘͢ͳΔ

9. ؾܰʹ࢖͍͍ͨͷͰ (FOFSBUPSΛ࡞ͬͨ

10. None

11. $ padrino g decorator Usage: padrino-gen decorator [name] Options: -r,

    [--root=ROOT] # The root destination # Default: . -a, [--app=APP] # The application destination path # Default: /app -d, [--destroy] -n, [--namespace=NAMESPACE] # The name space of your padrino project Description: padrino-gen decorator generates a new Padrino decorator ͔͍͔ͭͨ

12. $ tree . ᵓᴷᴷ app ᴹ ᵓᴷᴷ app.rb ᴹ ᵓᴷᴷ

    controllers ᴹ ᵓᴷᴷ decorators ᴹ ᴹ ᵋᴷᴷ post_decorator.rb ᴹ ᵓᴷᴷ helpers ᴹ ᵋᴷᴷ views ᵋᴷᴷ spec ᵋᴷᴷ app ᵋᴷᴷ decorators ᵋᴷᴷ post_decorator_spec.rb %FDPSBUPS༻ͷϑΝΠϧΛͭ͘Γ·͢

13. Rails

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