Introduction to Metaprogramming: Lesson 2

customer.rb

class Customer
  attr_reader :id, :datasource

  def initialize(id, datasource)
    @id = id
    @datasource = datasource
  end

  def first
    field :first
  end

  def last
    field :last
  end

  def email
    field :email
  end

  def age
    field :age
  end

  private

  def field(fieldname)
    value = datasource.send("get_#{fieldname}_value", id)
    "#{fieldname.capitalize}: #{value}"
  end

end