Rails - Sep 2007 - TypeError => Symbol as array index

Hello,

I''ve got a controller, which I''d like to protect from being
accessed by
untrusted users. I saw that you can use before_filter to do it.
I tried before_filter :filter on the page I''d like to protect and then
creating a private method on the super class and it works. I''d now like
to get some information from the controller ... So I tried before_filter
ApplicationController on the controller and then :

 def self.filter(controller)
    id = self.session[:user_id]
    # some other stuff
 end

And now, I get an error at the line of session :

TypeError in AdministrationController#index
Symbol as array index

Could you explain me why ?

Thanks a lot
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Hello,

I found my own answer : the method is statical (because of self) and 
session cannot be accessed from a statical context

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