From: Alexey Petrushin <axyd80@...>
Date: 2008-11-16T05:44:29+09:00
Subject: How to force 'const_missing' in 'YAML.load'?

Hello!

Is there a way to force 'const_missing' exception in 'YAML.load' if the
Class definition is not found?
By default if it can't find the class definition it just silently
instantiates the YAML::Object stub.

One solution is to add the Class to Domain Types. But for my situation
this is absolutely not suitable.

  YAML.add_domain_type("TheClass,2007", "") do |type, val|
    klass = eval(type.split(':').last)
    YAML.object_maker(klass, val)
  end

  class TheClass
    def to_yaml_type
      "!TheClass,2007/#{self.class}"
    end
  end

Other - alter 'Module' in 'yaml/tag.rb'

  class Module

    # ...

    def yaml_tag_read_class( name )
      eval(name, TOPLEVEL_BINDING) << ADD THIS LINE
      name
    end
  end

If i alter 'Module' in 'yaml/tag.rb' it works, but if i override it in
another place it doesn't. Why?!
-- 
Posted via http://www.ruby-forum.com/.