Rails - May 2007 - Using session-type data in an ActiveRecord callback...

Any suggestions on how best to gain access to session-type information
while in an ActiveRecord callback, such as after_save?

I am encrypting some information in the database, using the
generalized encryption/decryption handler in "Agile Web Development
With Rails" (p 375ff).  I got it working, and now I want to reference
a session field (a user PIN) which is NOT stored in the database...
for security reasons.

I can''t seem to gain access to the session method:

1. attempting to use session[''user''][''pin'']
gives me an "undefined
variable or method"
2. attempting to use
UserController.session[''user''][''pin''] gives
me a
message saying that it''s expecting an integer, not a string.

Any ideas as to how to either (1) gain access to the session hash or
(2) provide my own application-wide storage mechanism?

Thanks...jon


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I wouldn''t do it this way since it kind of muddy''s up the
controller &
model portions of the MVC.

Instead you should create an function that will set the PIN in the
user model like this.
attr_accessor :pin

Then in your controller just pass it to a user object

user = User.find_by_id(session[:user][:id])
user.pin = session[:user][:pin]
user.save!


in the Model

after_save
     # do whatever with the pin
      user.pin # this will call it now that you have set it
end

That''s the basic gist of it, I haven''t tested any of this
could but I
hope its clear enough to understand.

hope that helps,
Jim


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oops I meant instead of this
> after_save
>      # do whatever with the pin
>       user.pin # this will call it now that you have set it
> end

do this

after_save
       self.pin #to call the current user instances pin.
end


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Very cool, Jim... thank you very much... just the kind of guidance I
was looking for. I''ll give it a shot tomorrow.

...jon

On May 5, 7:25 pm, jimcfis...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:
> oops I meant instead of this
>
> > after_save
> >      # do whatever with the pin
> >       user.pin # this will call it now that you have set it
> > end
>
> do this
>
> after_save
>        self.pin #to call the current user instances pin.
> end

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