Rails - Oct 2012 - A general question about railstutorial.org sessions helper methods

Hi guys,

As you probably guess I''m pretty new to RoR. I''m going through
railstutorial.org, which I would recommend to other beginners like me, but 
at some point in chapter 8 there''s a bit of code I don''t
really get in the
sessions helper.

Here''s the code I''m talkng about :

module SessionsHelper

  def sign_in(user)
    cookies.permanent[:remember_token] = user.remember_token
    self.current_user = user
  end

def current_user=(user)
  @current_user = userend

def current_user
  @current_user ||= User.find_by_remember_token(cookies[:remember_token])end

end


What does self.current_user = user do?
It calls the current_user=(user) method passing user as a parameter, 
right? But do we need the user parameter? I got rid of it and it works 
fine, as far as I can see.


What does current_user=(user) do? 
And what/who calls current_user when?

... I''m kind of confused. If someone could explain that a bit, I would 
appreciate. Thx.

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On Tuesday, October 23, 2012 2:11:31 PM UTC+1, Jean-David
wrote:
>
> module SessionsHelper
>
>   def sign_in(user)
>     cookies.permanent[:remember_token] = user.remember_token
>     self.current_user = user
>   end
>
> def current_user=(user)
>   @current_user = userend
>
> def current_user
>   @current_user ||=
User.find_by_remember_token(cookies[:remember_token])end
>
> end
>
>
> What does self.current_user = user do?
> It calls the current_user=(user) method passing user as a parameter, 
> right? But do we need the user parameter? I got rid of it and it works 
> fine, as far as I can see.
>
>
> What does current_user=(user) do? 
> And what/who calls current_user when?
>
Typically you''re calling current_user, for example to check whether
there
is a logged in user, so that you know what user is creating comments, posts 
etc. 

As I read it, self.current_user= is just a bit of an optimisation - if the 
user has just signed in then you know what the current_user is so you can 
prime the cache (@current_user) with the user value you''ve been passed

Fred 

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Hmm I''m still confused.
But thx for helping.

Le mardi 23 octobre 2012 18:22:12 UTC+2, Frederick Cheung a écrit
:
>
>
> On Tuesday, October 23, 2012 2:11:31 PM UTC+1, Jean-David wrote:
>>
>> module SessionsHelper
>>
>>   def sign_in(user)
>>     cookies.permanent[:remember_token] = user.remember_token
>>     self.current_user = user
>>   end
>>
>> def current_user=(user)
>>   @current_user = userend
>>
>> def current_user
>>   @current_user ||=
User.find_by_remember_token(cookies[:remember_token])end
>>
>> end
>>
>>
>> What does self.current_user = user do?
>> It calls the current_user=(user) method passing user as a parameter, 
>> right? But do we need the user parameter? I got rid of it and it works 
>> fine, as far as I can see.
>>
>>
>> What does current_user=(user) do? 
>> And what/who calls current_user when?
>>
>
> Typically you''re calling current_user, for example to check
whether there
> is a logged in user, so that you know what user is creating comments, posts
> etc. 
>
> As I read it, self.current_user= is just a bit of an optimisation - if the 
> user has just signed in then you know what the current_user is so you can 
> prime the cache (@current_user) with the user value you''ve been
passed
>
> Fred 
>
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I am just about to finish chapter 7! So many times I have wished I could 
grab a chat with another person doing the tutorial, it''s a lonely 
journey I found ;)

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Hi Ruby-Forum.com User,

You''re not alone anymore... it''s really a small world after
all!
Good to know there''s someone out there going through the same pain as
you
do :)

I''m using google talk, feel free to add me to your contacts.

Le mercredi 24 octobre 2012 18:23:12 UTC+2, Ruby-Forum.com User a écrit
:
>
> I am just about to finish chapter 7! So many times I have wished I could 
> grab a chat with another person doing the tutorial, it''s a lonely 
> journey I found ;) 
>
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