From: Phrogz <phrogz@...>
Date: 2010-01-13T04:30:07+09:00
Subject: Re: NOOB Question on Instance Variable

On Jan 12, 12:17 pm, BlueHandTalking <j...@whidbey.com> wrote:
> In my ProjectsController I am creating 2 instance variables:
Looks like you're talking about Ruby on Rails, not Ruby the language.

> @displayphoto = Photo.find_by_project_id(params[:id])
And specifically here you appear to be using ActiveRecord.

> The @displayphoto instance returns a nil object.
That would appear to be because find_by_project_id is returning nil,
given the code you've shown.

> @photo = Photo.find_by_project_id(params[:id])
> works fine. So evidently it is the name @displayphoto
> that is causing the problem.
I believe that you are not testing what you think you are testing.
Where are you later asking for the value of @photo versus
@displayphoto. It is extremely unlikely that what you think is
happening is true.

> 1)  Must an instance variable always be the same
>      name as the name of the class?
No.