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Re: Ruby/Sinatra - Variable inside erb calls

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  Re: Ruby/Sinatra - Variable inside erb calls Eugen Ciur <ciur.eugen@gmail.com> - 2011-05-17 06:34 -0500
    Re: Ruby/Sinatra - Variable inside erb calls 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-17 14:16 -0500

#4666 — 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).


----
http://blog.eugen.co

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#4687

Eugen Ciur wrote in post #999234:
>
> (drop ':' operator, it is not necessary).
>

According to the Sinatra docs, it must be a symbol.

So I would just use string interpolation:

  erb :"templates/#{style}/layout"

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