Draper, decorator, view decorators, Rails 3, Rails 4,

1. Draper
Decorators/View-Models for Rails Applications
Visnupriya. J .R
7th April 2014
@visnupriya90| github.com/visnupriya
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2. What is Draper?
• object-oriented layer of presentation
logic to your Rails application.
• The idea of Draper is to provide real ruby
class between the template and the
model.
• To decorate templates.
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3. Why use Draper?
• Clean up complex view logic
• Provides decorators which
bundles view logic in an object
oriented fashion
• Easy to test than helpers
• Code readability and easy to
maintain
• Code reuse
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4. What is Decorator Pattern?
• It is a design pattern.
• It allows behavior to be added to an
individual object, either statically or
dynamically, without affecting the behavior of
other objects from the same class
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5. Let’s see how to use?
• Add Draper to your Gemfile
• Generate decorator for a model as shown
below
• rails generate decorator Article
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6. SAMPLE CODE
Time to wakeup
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7. Questions?
Thank you
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