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-rw-r--r--actionpack/lib/action_dispatch/middleware/session/cookie_store.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
index 92a86ee229..0fc63d026f 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
@@ -34,6 +34,14 @@ module ActionDispatch
# integrity defaults to 'SHA1' but may be any digest provided by OpenSSL,
# such as 'MD5', 'RIPEMD160', 'SHA256', etc.
#
+ # * <tt>:domain</tt>: Restrict the session cookie to certain domain level.
+ # If you use a schema like www.example.com and wants to share session
+ # with user.example.com set <tt>:domain</tt> to <tt>:all</tt>
+ #
+ # :domain => nil # Does not sets cookie domain. (default)
+ # :domain => :all # Allow the cookie for the top most level
+ # domain and subdomains.
+ #
# To generate a secret key for an existing application, run
# "rake secret" and set the key in config/environment.rb.
#