Yes, similarly if you do render @customer you get a variable called 'customer' 
when you render that template.

-- 
Cheers,

Koz


On Monday, 24 September 2012 at 10:07 AM, Prem Sichanugrist wrote:

> Right, I think I understand the problem incorrectly the first time.
> 
> If we do `render 'flash'`, then there should be no local variable name 
> `flash` that is nil. Does Rails currently create a nil variable name `flash`?
> 
> - Prem 
> 
> On Sunday, September 23, 2012 at 4:39 PM, Aaron Patterson wrote:
> 
> > On Tue, Sep 18, 2012 at 12:01:59PM -0700, John Firebaugh wrote:
> > > 
> > > 
> > > From this stack overflow 
> > > question<http://stackoverflow.com/questions/3111844/flash-messages-in-partials-rails-3/12482879>
> > > .
> > > 
> > > Suppose I have a partial _flash.html.erb for rendering the flash in a 
> > > consistent way. The natural thing to do would be to assume I can call 
> > > ActionView::Base#flash from within this partial to retrieve the flash, 
> > > and 
> > > render the partial withrender partial: "flash". But in fact, this doesn't 
> > > work. Even though I haven't passed object: flash orlocals: {flash: flash} 
> > > in 
> > > the call to render partial, PartialRenderer oh-so-helpfully defines a 
> > > flashlocal 
> > > variable, whose value is nil, shadowing ActionView::Base#flash. My 
> > > alternatives are to rename the partial or pass a value for the flash 
> > > local 
> > > explicitly using one of those more verbose call to render.
> > > 
> > > I suggest that if no object option or local with the same name as the 
> > > partial was passed to the render call, thatPartialRenderer *not* define a 
> > > local variable of the same name as the partial. This would change the 
> > > behavior for anyone who is relying on the current behavior to get a nil 
> > > value 
> > > for the local when they don't pass an explicit value, but that seems like 
> > > an unlikely case and easily fixed by passing nil explicitly, and it would 
> > > be much more useful to do things like call ActionView::Base#flash from 
> > > within a _flash.html.erb partial.
> > > 
> > > I'm happy to create a pull request if others agree.
> > 
> > Do you know where the code is that does this? I'd like to understand
> > why we do it before agreeing / disagreeing.
> > 
> > -- 
> > Aaron Patterson
> > http://tenderlovemaking.com/
> > 
> > 
> > 
> 
> 
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