Rails - Sep 2009 - Accessing the instance variable in another method

Hi,
I am new to Rails.I tried developing a basic quiz application.Please
help me out in my doubt.Thanks in advance

<% CODE %>

class QuizController < ApplicationController

  def index
# i have retrieved the first five questions from the database for
displaying the #question to user
    @quiz=Quiz.find(:all,:limit=>5)

  end

  def report

  end

# this method checks the answer and gives score
  def checkanswer
# here i want to access the @quiz object which is a set of questions i
have #retreived from the database.Hot to access it?
  end

  end
-- 
Posted via http://www.ruby-forum.com/.

Hi --

See my answer on ruby-talk.


David

-- 
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Book: The Well-Grounded Rubyist (http://www.manning.com/black2)

Subashini Kumar wrote:
> Hi,
> I am new to Rails.I tried developing a basic quiz application.Please
> help me out in my doubt.Thanks in advance
> 
> <% CODE %>
> 
> class QuizController < ApplicationController
> 
>   def index
> # i have retrieved the first five questions from the database for
> displaying the #question to user
>     @quiz=Quiz.find(:all,:limit=>5)
You should really call this variable @quizzes, so it will be clear that 
it contains an Array of Quiz objects, not just one.
> 
>   end
> 
>   def report
> 
>   end
> 
> # this method checks the answer and gives score
>   def checkanswer
> # here i want to access the @quiz object which is a set of questions i
> have #retreived from the database.Hot to access it?
You''ll need to retrieve the records again, or pass them in from params 
or the session.  Instance variables do not persist between controller 
method calls (because the controller is freshly instantiated each time a 
request is made).
>   end
> 
>   end
Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
-- 
Posted via http://www.ruby-forum.com/.

Subashini Kumar wrote:
> Hi,
> I am new to Rails.I tried developing a basic quiz application.Please
> help me out in my doubt.Thanks in advance
> 
> <% CODE %>
> 
> class QuizController < ApplicationController
> 
>   def index
> # i have retrieved the first five questions from the database for
> displaying the #question to user
>     @quiz=Quiz.find(:all,:limit=>5)
> 
>   end
> 
>   def report
> 
>   end
> 
> # this method checks the answer and gives score
>   def checkanswer
> # here i want to access the @quiz object which is a set of questions i
> have #retreived from the database.Hot to access it?
>   end
> 
>   end
hi Subashini,

I think you can use @quiz variable by making it a class variable as 
@@quiz or a global variable $quiz.

might help,

Saurabh
-- 
Posted via http://www.ruby-forum.com/.

On Tue, Sep 22, 2009 at 8:51 PM, Saurabh Peshkar <
rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
>
>
> hi Subashini,
>
> I think you can use @quiz variable by making it a class variable as
> @@quiz or a global variable $quiz.
>
> Certainly, a wrong way to do it. Don''t do it (at least in rails
controller)

As suggested earlier, you should pass ids in params or store in session to
retrieve in your check_answer method.

> might help,
>
> Saurabh
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
--
अभिनव
http://twitter.com/abhinav

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Saurabh Peshkar wrote:
[...]
> hi Subashini,
> 
> I think you can use @quiz variable by making it a class variable as 
> @@quiz or a global variable $quiz.
DON''T DO THAT!  That will cause other problems.
> 
> might help,
> 
> Saurabh
Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
-- 
Posted via http://www.ruby-forum.com/.