New Virtus Release With Truly Awesome Features

Posted by solnic on February 8, 2012 Leave a comment (8) Go to comments

Just a quick announcement that I just pushed a new version of Virtus with support for long awaited features: EmbeddedValue, member type coercions for array/set attributes and ValueObject. Current version is 0.2.0, please give it a try and tell me what you think.

Here’s a quick sneak-preview of what you can do with Virtus:

class GeoLocation
  include Virtus::ValueObject

  attribute :lat, Float
  attribute :lng, Float
end

class City
  include Virtus

  attribute :name,      String
  attribute :location,  GeoLocation
  attribute :districts, Array[Symbol]
end

class User
  include Virtus

  attribute :name, String
  attribute :age,  Integer

  attribute :city, City
end

user = User.new(
  :name => ‘John’,
  :age  => 29,
  :city => {
    :name      => ‘NYC’,
    :location  => { :lat => ‘1234567.89’, :lng => ‘9876543.21’ },
    :districts => [ ‘one’, ‘two’, ‘three’ ]
  }
)

user.city.location.lat # => 1234567.89
user.city.districts    # => [ :one, :two, :three ]

class GeoLocation

include Virtus::ValueObject

attribute :lat, Float

attribute :lng, Float

end

class City

include Virtus

attribute :name, String

attribute :location, GeoLocation

attribute :districts, Array[Symbol]

end

class User

include Virtus

attribute :name, String

attribute :age, Integer

attribute :city, City

end

user = User.new(

:name => ‘John’,

:age => 29,

:city => {

:name => ‘NYC’,

:location => { :lat => ‘1234567.89’, :lng => ‘9876543.21’ },

:districts => [ ‘one’, ‘two’, ‘three’ ]

}

)

user.city.location.lat # => 1234567.89

user.city.districts # => [ :one, :two, :three ]

I hope you’re going to enjoy it and find it useful in your projects. In case of any issues please report them on Github.

Huge props go to Dan Kubb, Emmanuel Gomez and Yves Senn for helping me with recent releases! Thanks guys!

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Drhenner

If this has a to_json method I see some really cool applications
- http://solnic.eu/ solnic
  
  Nope…it doesn’t have it and it won’t have it. Maybe it would be easy to make it work with, for example, active_model_serializers. Here’s a related discussion that explains the decision: https://github.com/solnic/virtus/issues/38
  - Peter Jaros
    
    Clicking “like” here because there’s no way to “like” a GitHub issue resolution. :)
    - http://solnic.eu/ solnic
      
      haha i’m actually surprised github doesn’t have “like” feature :)
diego

are you planning to implement the mutual registration pattern for bidireccional associations?
- http://solnic.eu/ solnic
  
  At the moment there’s no concept of associations at all. We are planning to implement associations later though. If we decide to do that then probably it will support this type of “registration”.
http://profiles.google.com/qertoip Piotr Włodarek

This is great. Finally the white magic known from models came to PORO.

BTW, have you seen ActiveAttr? https://github.com/cgriego/active_attr This project seems to share Virtus goals.
- http://solnic.eu/ solnic
  
  ActiveAttr is a much bigger library – the only shared goal is attributes and typecasting.

solnic.eu

probably the best tagline in the world