Draper - Decorators/View-Models for Rails Applications

Usage

# app/decorators/article_decorator.rb
class ArticleDecorator < Draper::Decorator
# ...
end

Generators

# generate controller
rails generate resource Article

# if model already exist
rails generate decorator Article

Decorating

@article = Article.first.decorate

# or initialize directly

@widget = ProductDecorator.new(Widget.first)
# or, equivalently
@widget = ProductDecorator.decorate(Widget.first)

Decoration Collection

@articles = ArticleDecorator.decorate_collection(Article.all)
# If your collection is an ActiveRecord query, you can use this:

@articles = Article.popular.decorate

Using pagination

with Kaminari

class PaginatingDecorator < Draper::CollectionDecorator
  delegate :current_page, :total_pages, :limit_value
end

References

• https://github.com/drapergem/draper
• https://github.com/drapergem/draper/issues/401
• rails 3で使える最後のversion 1.4.0