From: "mgerstenblatt@..." <mgerstenblatt@...>
Date: 2010-09-27T10:12:33+09:00
Subject: listing out available variables in an ERB template

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Hi All,

Suppose I have a Ruby ERB template named **my_template.html.erb**, and it
contains the following:

    <div><%= @div_1 %></div>
    <div><%= @div_2 %></div>
    <div><%= @div_3 %></div>

Is there a way I can programatically list out all the available variables in
the template?

For example, the following method:

    def list_out_variables
      template = File.open("path_to/my_template.html.erb", "rb").read
      erb = ERB.new( template )
      erb.this_method_would_list_out_variables
    end

would return something like:

    ['div1','div2','div3']


Any help would be greatly appreciated.

Thanks,
Mike

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