gistfile1.txt

master>rails new yammy
     [... nothing to see here ...]
master>cd yammy
master>rails g model Dummy name:string
      invoke  active_record
      create    db/migrate/20110114203601_create_dummies.rb
      create    app/models/dummy.rb
      invoke    test_unit
      create      test/unit/dummy_test.rb
      create      test/fixtures/dummies.yml
master>rake db:create
(in /Users/bob/src/yammy)
master>rake db:migrate
(in /Users/bob/src/yammy)
==  CreateDummies: migrating ==================================================
-- create_table(:dummies)
   -> 0.0013s
==  CreateDummies: migrated (0.0014s) =========================================

master>rails console
Loading development environment (Rails 3.0.3)
no such file to load -- wirble
ruby-1.8.7-p302 > d= Dummy.new
 => #<Dummy id: nil, name: nil, created_at: nil, updated_at: nil> 
ruby-1.8.7-p302 > d.name = "Todd"
 => "Todd" 
ruby-1.8.7-p302 > d.save
 => true 
ruby-1.8.7-p302 > d
 => #<Dummy id: 1, name: "Todd", created_at: "2011-01-14 20:36:31", updated_at: "2011-01-14 20:36:31"> 
ruby-1.8.7-p302 > tom = d.to_yaml
 => "--- !ruby/object:Dummy \nattributes: \n  name: Todd\n  created_at: &id001 2011-01-14 20:36:31.606010 Z\n  updated_at: *id001\n  id: 1\nattributes_cache: \n  created_at: *id001\n  updated_at: *id001\nchanged_attributes: {}\n\ndestroyed: false\nerrors: !omap []\n\nmarked_for_destruction: false\npersisted: true\npreviously_changed: !map:ActiveSupport::HashWithIndifferentAccess \n  name: \n  - \n  - Todd\n  created_at: \n  - \n  - *id001\n  updated_at: \n  - \n  - *id001\n  id: \n  - \n  - 1\nreadonly: false\nvalidation_context: \n" 
ruby-1.8.7-p302 > YAML.load(tom)
NoMethodError: undefined method `keys' for nil:NilClass
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activesupport-3.0.3/lib/active_support/whiny_nil.rb:48:in `method_missing'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activerecord-3.0.3/lib/active_record/base.rb:1512:in `attribute_names'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activerecord-3.0.3/lib/active_record/base.rb:1569:in `attributes'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activerecord-3.0.3/lib/active_record/attribute_methods.rb:57:in `attribute_method?'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activemodel-3.0.3/lib/active_model/attribute_methods.rb:394:in `match_attribute_method?'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activemodel-3.0.3/lib/active_model/attribute_methods.rb:393:in `each'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activemodel-3.0.3/lib/active_model/attribute_methods.rb:393:in `match_attribute_method?'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activemodel-3.0.3/lib/active_model/attribute_methods.rb:378:in `respond_to?'
	from /Users/bob/.rvm/gems/ruby-1.8.7-p302/gems/activerecord-3.0.3/lib/active_record/attribute_methods.rb:52:in `respond_to?'
	from /Users/bob/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/yaml.rb:133:in `transfer'
	from /Users/bob/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/yaml.rb:133:in `node_import'
	from /Users/bob/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/yaml.rb:133:in `load'
	from /Users/bob/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/yaml.rb:133:in `load'
	from (irb):6
ruby-1.8.7-p302 > Rails.version
 => "3.0.3" 
ruby-1.8.7-p302 > Rails.env
 => "development" 
ruby-1.8.7-p302 >