:db format for Date#to_s

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6060 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

 *SVN*
 
+* :db format for Date#to_s [Jeremy Kemper]
+    Date.new(2007, 1, 27).to_s(:db) # => '2007-01-27'
+
 * Added :instance_writer option to #mattr_writer/accessor, #cattr_writer/accessor, and #class_inheritable_writer to skip the creation of the instance writer.  [Rick]
 
 * Added Hash#to_query to turn a hash of values into a form-encoded query string [Nicholas Seckar]

activesupport/lib/active_support/core_ext/date/conversions.rb

@@ -5,7 +5,8 @@ module Date #:nodoc:
       module Conversions
         DATE_FORMATS = {
           :short => "%e %b",
-          :long  => "%B %e, %Y"
+          :long  => "%B %e, %Y",
+          :db => "%Y-%m-%d"
         }
 
         def self.included(klass) #:nodoc:

activesupport/test/core_ext/date_ext_test.rb

@@ -4,6 +4,7 @@ class DateExtCalculationsTest < Test::Unit::TestCase
   def test_to_s
     assert_equal "21 Feb",            Date.new(2005, 2, 21).to_s(:short)
     assert_equal "February 21, 2005", Date.new(2005, 2, 21).to_s(:long)
+    assert_equal "2005-02-21",        Date.new(2005, 2, 21).to_s(:db)
   end
 
   def test_to_time