Ensure that rails sessions remain valid over subdomains and https

By Alastair | October 24, 2006

If you’re using Active Record Store for your sessions (keeping sessions in a database) you may ‘lose’ your sessions when jumping to a subdomain or to a https connection (in my case it was the latter).

Here’s how to make sure your sessions don’t go walk about.

Add this line to your ‘config/environments/production.rb’ file

ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS.update(:session_domain => '.mydomain.com')

obviously replacing ‘mydomain.com’ for the domain in question.

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7 Comments

  1. Sandro
    Posted June 6, 2007 at 8:26 am | Permalink

    You definitively save my life :D

  2. artifactory
    Posted July 5, 2007 at 2:04 pm | Permalink

    Ditto – saved me some serious time. kudos.

  3. Jason
    Posted April 7, 2008 at 7:47 am | Permalink

    Very much thank yous sire.

  4. rndrfero
    Posted May 5, 2008 at 5:13 am | Permalink

    FOR ME (rails 2.0.2) THIS DID NOT WORK !!!!

    instead of it works following line:

    ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain] = ‘.mydomain.com’

  5. Alastair
    Posted May 5, 2008 at 6:21 am | Permalink

    THIS POST IS TWO YEARS OLD!!! BUT THANKS FOR THE UPDATE AND THE CAPS!!!

  6. Jeff
    Posted May 30, 2008 at 5:28 am | Permalink

    I HAVE RAILS 2.0.2

    ADDING ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain] = ‘.mydomain.com’
    gives me an authenticity error

    are u suure it’s right?

  7. NilsR
    Posted April 7, 2009 at 3:15 am | Permalink

    Still does the job in Rails 2.3.2!

    Thanks alot.

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