From: Josh Cheek <josh.cheek@...>
Date: 2010-09-27T12:51:04+09:00
Subject: Re: listing out available variables in an ERB template

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On Sun, Sep 26, 2010 at 8:12 PM, mgerstenblatt@gmail.com <
mgerstenblatt@gmail.com> wrote:

> 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
>


Ruby has some reflexive methods you can use.


$gvar = 1
lvar  = 2
@ivar = 3
class Foo
  @@cvar = 4
end

p instance_variables
p global_variables
p local_variables
class Foo
  p class_variables
end

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