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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