preference.rb in preferences-0.1.0

- old
+ new

@@ -8,20 +8,32 @@
 # the color, and the +target+ is the Car.  This allows preferences to have a sort
 # of context around them.
 class Preference < ActiveRecord::Base
   belongs_to  :owner,
                 :polymorphic => true
-  belongs_to  :preferenced,
+  belongs_to  :group,
                 :polymorphic => true
   
   validates_presence_of :attribute,
                         :owner_id,
                         :owner_type
-  validates_presence_of :preferenced_id,
-                        :preferenced_type,
-                          :if => Proc.new {|p| p.preferenced_id? || p.preferenced_type?}
+  validates_presence_of :group_type,
+                          :if => :group_id?
   
+  class << self
+    # Splits the given group into its corresponding id and type
+    def split_group(group = nil)
+      if group.is_a?(ActiveRecord::Base)
+        group_id, group_type = group.id, group.class.base_class.name.to_s
+      else
+        group_id, group_type = nil, group
+      end
+      
+      return group_id, group_type
+    end
+  end
+  
   # The definition for the attribute
   def definition
     owner_type.constantize.preference_definitions[attribute] if owner_type
   end
   
@@ -29,6 +41,12 @@
   def value
     value = read_attribute(:value)
     value = definition.type_cast(value) if definition
     value
   end
+  
+  # Only searches for the group record if the group id is specified
+  def group_with_optional_lookup
+    group_id ? group_without_optional_lookup : group_type
+  end
+  alias_method_chain :group, :optional_lookup
 end