Sinatra and computed view name

I'm completely new in Ruby and Sinatra so please forgive the trivial question:

I wanted to compute the view name instead of just passing in a symbol. I wanted the same action to return different views depending on the current state. There's like 20 different states so putting a good naming convention allows me to express the view name as a string very easily:

get "/page" do
  erb "page-#{session[:page]}"
end

When I do that all I get is the string instead of the rendered view. Can anyone explain to me how I could do that in开发者_JAVA百科 Sinatra?

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I'd say you're probably looking for String#to_sym. I didn't test now, but all the examples say erb receives a symbol argument, not a string - so try this:

erb "page-#{session[:page]}".to_sym

or equivalently

erb :"page-#{session[:page]}"

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If you pass string to erb it tries to render that string directly, not seeking for view with corresponding name. Converting string to symbol will help.