# How to get session's cookie string

**URL:** <https://www.ruby-forum.com/t/how-to-get-sessions-cookie-string/148560>\
**Category:** Rails\
**Created:** [September 15, 2008, 1:40am UTC](https://www.ruby-forum.com/t/how-to-get-sessions-cookie-string/148560 "2008-09-15T01:40:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fanz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/87869e/32.png) [@fanz](https://www.ruby-forum.com/u/fanz)\
**Post date:** [September 15, 2008, 1:40am UTC](https://www.ruby-forum.com/t/how-to-get-sessions-cookie-string/148560/1 "2008-09-15T01:40:55Z")

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Hi,everyone!  
I have a problem:  
After using session[:foo]=foo change my session, I want to know what  
the new “session\_key” cookie value would be before I response. I tried  
session.to\_s and session.encode but didn’t work.  
Thanks in advance:-)