From: Gennady Bystritsky <Gennady.Bystritsky@...>
Date: 2011-01-28T00:43:43+09:00
Subject: Re: Newbie moving from other language - simple inline Rails conditional

On Jan 25, 2011, at 12:55 PM, Peter D Bethke wrote:

> Hi All,
> 
> I'm moving to Ruby from another language and I'm working through the basics by altering an existing Rails project. One of the basic things I'd like to do is to highlight a link for example with the css id "current" when the current url matches a certain string.
> 
> I'm trying it first as in inline conditional, and failing miserably:
> 
> <%= (request.fullpath == '/home/menu') ? render :text => 'current' %>
> 
> Basically, I'm trying to say "if the fullpath = x, then output the string "current". I'm sure that the answer is simple.

The correct syntax for the construct you use is:

cond ? expr_true : expr_false

in your case there's no expr_false. So re-wright it to something like:
<%= (request.fullpath == '/home/menu') ? render(:text => 'current') : "" %>

Or if you really do not need the false expression, you can do something like
<%= render(:text => 'current') if (request.fullpath == '/home/menu') %>

Gennady.

> 
> Ruby is pretty cool, I'm enjoying it immensely.
> 
> Best,
> 
> Peter D Bethke
>