irb(main):140:0> Card.find(:id => 1)
=> #<Card @values={:balance=>100.0, :first_name=>"Diego", :last_name=>"Viola", :id=>1, :card_number=>"1000"}>
irb(main):141:0> Card.find(:id => 1).first_name
NoMethodError: undefined method `first_name' for #<Card:0xb76c719c>
        from (irb):141
        from :0
irb(main):142:0>