Being DRY
Your code might be,
but are you?
By Jeroen van Dijk

Examples of tools
to make you DRY...
rails-templates capistrano
I18n rake scaffolds sass
haml make_resourceful

What is missing
to keep you DRY?
... An idea:
Scaffold of your
complete datamodel?

But scaffolds
generate code...
... for just one resource!
... not following my own conventions!
... that still requires a lot of customization!
All true, that’s why I’ll not talk about the old way
of scaffolding...

Instant Rails
rails shop -m http://www.jeevidee.nl/instant_rails_application.txt

Don’t like uml or need
customization?
For examples or just to start
For an old application: “rake dm:export”
For a new application: “rake dm:xmi:to_yaml”
Customize
• which templates should be generated
• which attributes/association should be used
in your templates

Not enough?
• Adapt the templates to your liking
• Define your own formats
email:
native_type: string
examples:
valid: jeroen@jeevidee.nl
invalid: jeroen_jeevidee.nl
display:
default: “mail_to(“{{field}}”)

Useful for...
• super fast prototyping
• refactoring
• applying good conventions (e.g. css, models)
Not just uml2rails

The new DRY for Rails?
• Design the basics of your application
• Run the generator with your own
customizations
• Customize the application

Summary of features
Yaml/Uml export to:
OK Models
OK Views (+helpers)
OK Controllers
OK Migrations
OK Fixtures
OK Custom formats
FAIL Documentation + Tests
PENDING Intelligent generation of Routes
PENDING Generation of Tests/Specs/Stories
Information on attributes and associations is exploited
in all of the above.

More info or contribute
Source
http://github.com/jeroenvandijk/dm_generator
http://github.com/jeroenvandijk/dm_templates
http://github.com/jeroenvandijk/dm_designs
Documentation/blog (coming soon)
http://www.jeevidee.nl
Demonstration
rails shop -m http://www.jeevidee.nl/instant_rails_application.txt

Questions?