[Rails] Share Cookies in rails 3.1.3

Hi all,


  i am using Rails 3.1.3 and ruby 1.9.3.i need to set the cookies for multiple domain,
         Example: test.abc.com and example.abc.com are the two different domain, i need to set the same cookie for the both domain. If user login with test.abc.com can automatically login with example.abc.com..

I have tried :
            Rails.application.config.session_store :cookie_store, :key => '_Admin_Kernel_session', :domain=>:all
            Rails.application.config.session_store :cookie_store, :key => '_Admin_Kernel_session', :domain=>".abc.com"
            cookies.permanent.signed[:new_cookie] = {:value => new_value, :domain => ".abc.com"}
            cookies[:some_cookie] = {:value => "whatever", :domain => ".abc.com", :expires => 1.year.from_now.utc}
 
            i have tested with  middle-ware to set session domain but no use.

Please could any one tell me how to implement.

Kingston.s

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