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form画面内のselectでcollection一覧を分かりやすくする

Posted at 2017-12-01

普通にDraperでdecoratorを適用するだけど忘れそうなのでメモ

app/decorators/tag_decorator.rb

class TagDecorator < ApplicationDecorator
  def name
    "id:#{object.id} <#{object.text_ja}>"
  end
end

app/admin/post_decorator.rb

form do |f|
  ...
  f.input :tag,
    collection: TagDecorater.decoreate_collection(Tag.all)
  ...
end

もちろんCollectionに対してDecoratorを作っておく方法でも良い

         ↓
class TagsDecorator < Draper::CollectionDecorator
  def page_number
    42
  end
end
--- 
   ↓
TagsDecorater.decoreate(Tag.all)