Nashie takes the Hashie concept one step further and allows you to create nested structure with buildin validation logic.
Nashies are used in the wild as presenters for API responses and to validate incoming API calls.
Add this line to your application's Gemfile:
gem 'nashie'
And then execute:
$ bundle
Or install it yourself as:
$ gem install nashie
class Part < Hashie::Nash
property :name, :required => true
end
class Engine < Hashie::Nash
property :build_year, :required => true
property :nitro, :default => false
property :parts, :collection => true, :class => "Part"
end
class Car < Hashie::Nash
property :engine, :required => true, :class => Engine
end
car = Car.new "engine" => {"build_year" => 2010, "nitro" => false, :parts => [{"name" => "crankshaft"}, {"name" => "flywheel"}]}
Overriding the initialization method allows you to inject some custom logic if needed.
class Motorcycle
def initialize hash
raise "Euhm, a motorcycle has 2 wheels you know..." if not hash[:wheels].eql? 2
super hash
end
end
A DSL is provided for inline declaration.
class Presentation < Hashie::Nash
property :users, :collection => true, :required => true do
property :name
end
end
- more types of validations
- Customizable error messages
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Added some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request
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