Added a small comment about deleting cookies set with a :domain key (in order to delete you must specify the domain again).

1 files changed, 10 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/cookies.rb b/actionpack/lib/action_controller/cookies.rb
index a4cddbcea2..51bc4ad23d 100644
--- a/actionpack/lib/action_controller/cookies.rb
+++ b/actionpack/lib/action_controller/cookies.rb
@@ -22,6 +22,16 @@ module ActionController #:nodoc:
   #
   #   cookies.delete :user_name
   #
+  # Please note that if you specify a :domain when setting a cookie, you must also specify the domain when deleting the cookie:
+  #   
+  #  cookies[:key] = {
+  #    :value => 'a yummy cookie',
+  #    :expires => 1.year.from_now,
+  #    :domain => 'domain.com'
+  #  }
+  #
+  #  cookies.delete(:key, :domain => 'domain.com')
+  #
   # The option symbols for setting cookies are:
   #
   # * <tt>:value</tt> - The cookie's value or list of values (as an array).