Date Formatting requires a to_date conversion before format

It is working fine for me with rails edge. Can you try again with rails edge?

Time::DATE_FORMATS[:dashy_format]                   = '%Y-%m-%d-%H-%m-%S'  # => 2007-10-23-17-23-23

ruby-1.8.7-p249 > User.first.created_at.to_s(:dashy_format)
  User Load (0.3ms)  SELECT "users".* FROM "users" LIMIT 1
 => "2010-06-25-20-06-41"

Date::DATE_FORMATS is working for me.

ActiveRecord::Schema.define(:version => 20100627025642) do

  create_table "users", :force => true do |t|
    t.string   "name"
    t.date     "dob"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

end
class User < ActiveRecord::Base
end

User.create(:dob => Date.today)
ruby-1.8.7-p249 > User.first.dob.to_s(:dashy)
  User Load (0.3ms)  SELECT "users".* FROM "users" LIMIT 1
 => "2010-06-26"

So is it simply that DateTime columns don't use Date::DATE_FORMATS without a conversion first? This needs to be a little clearer (in fact all of date/time formatting could do with some docs...)