PadrinoDecorator

渋谷.rb[:20130918] での発表資料です

Transcript

1. σίϨʔλͷ
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3. app/views/posts/show.slim
   - if @post.image.present?
   = image_tag @post.image.url
   - else
   = image_tag ‘default.png’
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   WJFX
   

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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
   

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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
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   NPEFM
   

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

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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%FDPSBUPSʹҠ͢
   

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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
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9. ؾܰʹ࢖͍͍ͨͷͰ
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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
    ͔͍͔ͭͨ
    

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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·͢
    

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13. Rails
    

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21. -FUTUBMLBCPVUJU
    

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