Ruby on Rails Friday, September 5, 2014



On Friday, 29 August 2014 15:01:41 UTC-4, António wrote:

Dear all,

 

I am a new "Ruby/Ruby on Rails" programmer. I am not sure this is the correct forum for my question. If this is not the correct forum, please indicate me a more appropriate one.

 

 

When my application implements a URL, an array, @session, is used in several methods of a first controller. The application redirects to another page, making a second controller being invoked. This controller does not use the array. When the method of the second controller ends, a layout is implicitly rendered. The layout has the following code:

 

...

<body>

        <% if @session.length == 0 then %>

...

 

I got the following error message when trying to implement the URL: undefined method `length' for nil:NilClass.

 

What should I do in order to the array be recognized by the second controller?

 


Controllers and their instance variables are torn down after each request; setting @session in one won't have any effect on subsequent requests.

You may want to look into the built-in `session` helper, which uses signed cookies:

http://guides.rubyonrails.org/action_controller_overview.html#session

The Guides site overall will be very useful to you.

--Matt Jones
 

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