URLPARAM variable can't read a parameter of "0"

The result of "%URLPARAM{"TestVal"}%" should be "0" on a page with "?TestVal=0" in the url. But in fact it evaluates to the empty string "".

Test case

Click https://www.twiki.org/cgi-bin/view/Codev/UrlParamFailsWhenZero?TestVal=0 or https://www.twiki.org/cgi-bin/view/Codev/UrlParamFailsWhenZero?TestVal=1 and note the result: "".

The reason for this appears to be in handleUrlParam in TWiki.pm. The line that reads:

   $value = $cgiQuery->param( $theParam ) || "";

   $value = $cgiQuery->param( $theParam );
   $value = "" if (! defined $value);

I see the || "" construction elsewhere in TWiki.pm, I wonder if this same bug might strike elsewhere?

Environment

-- GladeDiviney - 01 Aug 2002

Follow up

Fix record

Thanks for reporting and providing code. Is fixed, in TWikiAlphaRelease and at TWiki.org.

-- PeterThoeny - 02 Aug 2002