Song class

song.rb

class Song
  include ActiveModel::Model
  include ActiveModel::Attributes
  include ActiveModel::Serializers::JSON

  attr_accessor :name, :artist, :genre, :id

  validates_presence_of :name, :artist

  def attributes=(hash)
    hash.each do |key, value|
      send("#{key}=", value)
    end
  end

  def attributes
    {
      'name' => nil,
      'artist' => nil,
      'genre' => nil,
      'id' => nil,
    }
  end

end