<p>In app/models/user.rb:</p>
<pre style='color:#555'>> @@ -222,6 +228,40 @@ def access_token(application_key)
>      return ClientApplication.find_by_key(application_key).access_token_for_user(self)
>    end
>  
> +
> +public
> +
> +  #  Helpers for outputting only public data via JSON
> +  cattr_accessor :public_fields
> +  @@public_fields = [:id, :display_name]
> +
> +  alias_method :ar_to_json, :to_json  
</pre>
<p>You shouldn't need to use <code>alias_method</code> here - just use <code>super</code> when you want to pass the call on to the inherited version.</p>

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