From: Eugen Ciur <ciur.eugen@...>
Date: 2011-05-17T20:34:11+09:00
Subject: Re: Ruby/Sinatra - Variable inside erb calls

You are on the right track:

:~> $ irb
ruby-1.9.2-p0 > :"hello"+'world'
NoMethodError: undefined method `+' for :hello:Symbol
        from (irb):1
        from /home/eugenc/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in
`<main>'
ruby-1.9.2-p0 > x = "hello"+'world'
 => "helloworld"
ruby-1.9.2-p0 > :x
 => :x
ruby-1.9.2-p0 >


In your case ruby converted :'templates/' to symbol, then tried to
concatenate string to it, this is because ':' has higher priority then
'+' operator. Solution is

 template_name  = 'templates/'+style+'/layout'
 erb template_name

(drop ':' operator, it is not necessary).


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