From: Mallory Cloutier <cloutier@...>
Date: 2008-08-27T06:43:46+09:00
Subject: Possible bug in CGI::HtmlExtension::popup_menu?

Hi all,
I'm trying to use popup_menu to generate a select box that remembers
what option it had selected when the page was generated.  The relevant
lines of code are

dura_list = cgi.popup_menu("dura",
        ["300", "Five minutes", (timespan == 300)],
        ["600", "Ten minutes", (timespan == 600)],
        ["900", "Fifteen minutes", (timespan == 900)])

where timespan has already been set to either the integer value of the
parameter "dura" or to a default value of 300.

According to the documentation as I understand it, this should generate

<SELECT NAME="dura"><OPTION SELECTED VALUE="300">Five
minutes</OPTION><OPTION VALUE="600">Ten minutes</OPTION><OPTION
VALUE="900">Fifteen minutes</OPTION></SELECT> <br>

but instead it generates

<SELECT NAME="dura"><OPTION SELECTED VALUE="300">Five
minutes</OPTION><OPTION VALUE="600">false</OPTION><OPTION
VALUE="900">false</OPTION></SELECT> <br>

Looking through the source for popup_menu on
http://ruby-doc.org/stdlib/libdoc/cgi/rdoc/index.html, I found

          if value.kind_of?(String)
            option({ "VALUE" => value }){ value }
          else
            if value[value.size - 1] == true
              option({ "VALUE" => value[0], "SELECTED" => true }){
                value[value.size - 2]
              }
            else
              option({ "VALUE" => value[0] }){
                value[value.size - 1]
              }
            end
          end

which I think is causing this.  Since value[value.size - 1] is false,
the last else clause is getting triggered and using that as the option
text.  I wasn't able to find any other reports of this to see if there's
a workaround or fix yet.
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