Added support for Rails 3

lib/uniquify.rb

@@ -15,11 +15,11 @@ def uniquify(*args, &block)
       options = { :length => 8, :chars => ('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a }
       options.merge!(args.pop) if args.last.kind_of? Hash
       args.each do |name|
-        before_create do |record|
+        before_validation :on => :create do
           if block
-            record.ensure_unique(name, &block)
+            ensure_unique(name, &block)
           else
-            record.ensure_unique(name) do
+            ensure_unique(name) do
               Array.new(options[:length]) { options[:chars].to_a[rand(options[:chars].to_a.size)] }.join
             end
           end