ActiveModel::Attribute 
Declares attributes for Active Model objects.
Installation
Add this line to your application's Gemfile:
gem "active_model-attribute"And then execute:
$ bundle
Or install it yourself as:
$ gem install active_model-attribute
Usage
class User
include ActiveModel::Attribute
attribute :name, :string
attribute :position, :string
attribute :age, :integer
attribute :active, :boolean
alias_attribute :full_name, :name
end
user = User.new(
name: 'Bob',
position: 'Developer',
age: '42',
active: false
)
user.age
# => 42
user.age.class
# => Integer
user.full_name
# => 'Bob'
user.active?
# => falseLicense
The gem is available as open source under the terms of the MIT License.