Remember Me login capability

I have a two part question.

First just wondering if anyone out there has any good Remember Me login
coding example or tutorials? I found one that is a couple years old and
it seems like if should work for a rails 2.0 application but I won’t
know until I try.

Second, the code example that I did find and am intergrating has a
couple lines that are just confusing. In this example the user logins
and if the remember me check box is checked this bit of code is

Controller code for login

cookies[:auth_token] = { :value => @session[:user].remember_token ,
:expires =>
@session[:user].remember_token_expires }

Then, theoretically you close down the browser and the next time you
open it and navigate to my website you should be automatically logged

The issue that I have - and I think this is because I am not
understanding the ruby code - is, in the remember_me method of the User
model I have this bit of code:

self.remember_token = Digest::SHA1.hexdigest("#{salt}–#{}–#

and this bit of code in the ApplicationController

user = User.find_by_remember_token(cookies[:auth_token])

When I save the value for the remember_token I don’t see how I am going
to be able to find that value in the database with the
find_by_remember_token because of the odd syntax used in the hexdigest

If the cookie has has a :value => ‘…’ and a :expires => ‘…’, how is
the find_by_remember_token going to work when the remember_token is
encrypted by saying
“#{salt}–#{}–#{self.remember_token_expires}”? It just
doesn’t seem to me that the encrypted info and the cookie would be the
same in the end and that I would therefore not be able to find anything
by the User.find_by_remember_token.

Not sure if this makes sense, I just didn’t want to get to far into this
project without fully understanding what is going on. Thanks,


Theres a good example of the code you’re looking for on the Railsspace
site. The URL is :

On Dec 12, 7:46 pm, Shandy N. [email protected]

Shockmeister wrote:

Theres a good example of the code you’re looking for on the Railsspace
site. The URL is :

On Dec 12, 7:46�pm, Shandy N. [email protected]
I’m pretty sure that
has that feature as well. You might look to see how it implements it.

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