Revert serialization refactoring that had some major issues

This reverts commit cbde340.

lib/delayed/backend/base.rb

@@ -68,7 +68,7 @@ def name
 
       def payload_object=(object)
         @payload_object = object
-        self.handler = object.to_delayed_yaml
+        self.handler = object.to_yaml
       end
 
       def payload_object

lib/delayed/serialization/active_record.rb

@@ -1,18 +1,13 @@
 class ActiveRecord::Base
-  def to_delayed_yaml( opts = {} )
-    YAML::quick_emit( self, opts ) do |out|
-      out.map("tag:delayed_job.com,2010:ActiveRecord:#{self.class.name}", to_yaml_style) do |map|
-        map.add('id', id)
-      end
-    end
-  end
-end
+  yaml_as "tag:ruby.yaml.org,2002:ActiveRecord"
 
-YAML.add_domain_type('delayed_job.com,2010', 'ActiveRecord') do |tag, value|
-  begin
-    type, model = YAML.read_type_class(tag, Kernel)
-    model.find(value['id'])
+  def self.yaml_new(klass, tag, val)
+    klass.find(val['attributes']['id'])
   rescue ActiveRecord::RecordNotFound
     raise Delayed::DeserializationError
   end
+
+  def to_yaml_properties
+    ['@attributes']
+  end
 end

lib/delayed/yaml_ext.rb

@@ -15,14 +15,14 @@ def to_yaml( opts = {} )
       out.scalar(taguri, self.name, :plain)
     }
   end
-
+  
   def yaml_tag_read_class(name)
     # Constantize the object so that ActiveSupport can attempt
     # its auto loading magic. Will raise LoadError if not successful.
     name.constantize
     name
   end
-
+  
 end
 
 class Class
@@ -38,9 +38,3 @@ def self.yaml_tag_read_class(name)
     "Struct::#{ name }"
   end
 end
-
-class Object
-  def to_delayed_yaml
-    to_yaml
-  end
-end