Ejemplo JBuilder

class Person
  attr :name, :age
  # ... Class Definition ... #
  def initialize(name, age)
      @name = name
      @age = age
  end
 
  def to_builder
    Jbuilder.new do |person|
      person.(self, :name, :age)
    end
  end
end

class Company
  attr :name
  # ... Class Definition ... #
  def initialize(name, person)
      @name = name
      @person = person
  end
 
  def to_builder
    Jbuilder.new do |company|
      company.(self, :name)
      company.president person.to_builder
    end
  end
end

company = Company.new('Doodle Corp', Person.new('John Stobs', 58))
company.to_builder.target!

=> "{\"name\":\"Doodle Corp\",\"president\":{\"name\":\"John Stobs\",\"age\":58}}"