Guillaume Maury's Ramblings

How to keep things in the session object even after logging in

If you look at the source code from the merb-auth-slice-password sessions controller you have the following before filters

 before :_maintain_auth_session_before, :exclude => [:destroy]  # Need to hang onto the redirection during the session.abandon!
  before :_abandon_session,     :only => [:update, :destroy]
  before  :_maintain_auth_session_after,  :exclude => [:destroy]  # Need to hang onto the redirection during the session.abandon!

and the associated code:

  # @private
  def _maintain_auth_session_before
    @_maintain_auth_session = {}
    Merb::Authentication.maintain_session_keys.each do |k|
      @_maintain_auth_session[k] = session[k]
    end
  end
  
  # @private
  def _maintain_auth_session_after
    @_maintain_auth_session.each do |k,v|
      session[k] = v
    end
  end
  
  # @private
  def _abandon_session
    session.abandon!
  end

So if you want to keep some elements from the session accross login you just need to add the keys to Merb::Authentication.maintain_session_keys

Like this: (I put it in merb/merb-auth/setup.rb)

	Merb::Authentication.maintain_session_keys << :lang << :guest

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