Am I misunderstanding something with my YAML code?

dubstep · February 9, 2011, 12:41am

I thought I was grasping the concepts of yaml, but I am growing confused
as
I am messing with it doing some example coding with it. Here is a gist
of my
code.

gist.github.com

https://gist.github.com/buddylindsey/817528

YAML Example - Problem

require 'yaml'

# setup an object to serialize with yaml
class Square
  attr_accessor :width, :height, :bonus, :me
  def initialize width, height
    @width = width
    @height = height
    @bonus = ['yo',{:msg => 'YAML 4TW', :alert => 'I am an alert'}]
    @me = self

This file has been truncated. show original

It works fine until it goes to load the main.yaml file at which point I
get
the following error.

yaml1.rb:37:in <main>': undefined method width’ for
#String:0x000001010fb9d0 (NoMethodError)

It seems like it should work. Am I just missing something or am I
approaching it wrong.

Thanks,
Buddy

Buddy Lindsey

http://www.twitter.com/buddylindsey

Buddy_LindseyS_Jr · February 9, 2011, 1:17am

On Feb 8, 2011, at 15:41 , Buddy Lindsey, Jr. wrote:

#String:0x000001010fb9d0 (NoMethodError)

It seems like it should work. Am I just missing something or am I
approaching it wrong.

You’re serializing yaml to yaml:

serialized = Square.new(2,3).to_yaml

save yaml to file

File.open(‘main.yaml’, ‘w’) do |out|
YAML.dump(serialized, out)
end

% ri YAML.dump
= YAML.dump

(from ruby core)

dump( obj, io = nil )

Converts obj to YAML and writes the YAML result to io.

File.open( ‘animals.yaml’, ‘w’ ) do |out|
YAML.dump( [‘badger’, ‘elephant’, ‘tiger’], out )
end

If no io is provided, a string containing the dumped YAML is returned.

YAML.dump( :locked )
#=> “— :locked”

Buddy_LindseyS_Jr · February 9, 2011, 1:21am

Okay, that is what I get for refactoring code. I totally missed that. I
was
trying to make the code a little prettier than it was and completely
disregarded YAML.dump. That makes sense

Thanks,
Buddy

Buddy Lindsey

http://www.twitter.com/buddylindsey