PartialObject

A way to easily define objects that take arguments at different places

Add this line to your application's Gemfile:

gem 'partial_object'

And then execute:

$ bundle

Or install it yourself as:

$ gem install partial_object

First, include PartialObject on the class. Then, define the required_parameters and/or the optional_parameters.

After that, you'll be able to use the arguments by the defined parameter names.

Required arguments will raise ArgumentError when the argument is used but not passed.

Optional arguments will be nil when used but not passed.

Let me give you an example:

class Person
  include PartialObject
  required_parameter :name, :last_name
  optional_parameter :language, :email

  def hey
    text = "Hey #{name} #{last_name}!"
    text += "\nI will contact you via #{email} in #{language || 'english'}" if email
    text
  end
end

jd = Person
  .new(:last_name => "D.")
  .partial(:language => "french")
  .partial(:name => "J.")

another_person = jd
  .partial(:name => "John", :email => "john@doe.com")

puts jd.hey
#=> Hey J. D.!

puts another_person.hey
#=> Hey John D.!
#=> I will contact you via john@doe.com in french

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/mateuadsuara/partial-object.rb

The gem is available as open source under the terms of the MIT License.