SmartCore::ValueObject · ·

Value Object pattern realized in scope of Ruby.

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Major features

• attribute and property semantics;
• primitive immutability based on #freeze invocation;
• read-only instance attributes and properties;
• support for hash representation (other formats coming soon);
• support for:
  • semantic comparability (Comparable, #<=>, #eql?) (based on object's type and object's attributes and parameters);
  • semantic enumerability (Enumerable, #each) (enumerates itself by default);
  • (soon) #clone and #dup;

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Installation

gem 'smart_value-object'

bundle install
# --- or ---
gem install smart_value-object

require 'smart_core/value-object'

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Synopsis

class Address < SmartCore::ValueObject
  attribute :country, 'value.string' # an alias of SmartCore::Types::Value::String (see smart_initializer gem)
  attribute :city,    'value.string'
  property :location, 'value.string'
  property :capital,  SmartCore::Types::Value::Boolean
end

khabarovsk = Address.new('Russia', 'Khabarovsk', location: '48.4814/135.0721', capital: false)
same_city = Address.new('Russia', 'Khabarovsk', location: '48.4814/135.0721', capital: false)
another_city = Address.new('Russia', 'Moscow', location: '59.9311/30.3609', capital: false)

khabarovsk.frozen? # => true

khabarovsk.country # => 'Russia'
khabarovsk.city # => 'Khabarovsk'
khabarovsk.location # => '48.4814/135.0721'
khabarovsk.capital # => false

khabarovsk.to_h # or #as_hash or #to_hash
# => returns:
{ city: 'Russia', country: 'Khabarovsk', location: '48.4814/135.0721', capital: false }

# comparability:
khabarovsk == same_city # => true
khabarovsk == another_city # => false

# default Enumerable behavior:
khabarovsk.to_a # => [khabarovsk]
khabarovsk.each { |entity| puts entity } # => outputs itself

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Roadmap

• Migrate to GitHub Actions;

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Build

• run tests:

bundle exec rspec

• run code style checks:

bundle exec rubocop

• run code style checks with auto-correction:

bundle exec rubocop -A

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Contributing

• Fork it ( https://github.com/smart-rb/smart_value-object )
• Create your feature branch (git checkout -b feature/my-new-feature)
• Commit your changes (git commit -am '[feature_context] Add some feature')
• Push to the branch (git push origin feature/my-new-feature)
• Create new Pull Request

License

Released under MIT License.

Supporting

Authors

Rustam Ibragimov