Item1101: TablePlugin Sort error

Priority:	CurrentState:	AppliesTo:	Component:	WaitingFor:
Low	No Action Required	Extension	TablePlugin

The following simple table gets an error on my installation - here not!? I have looked at the tasks with TablePlugin and didn't found such a Problem.

A	B
2	5
1	2
3	0

Playing around with this table:

• 0 Error: Foswiki detected an internal error - please check your Foswiki logs and webserver logs for more information.
  Use of uninitialized value in numeric comparison (<=>)
  Use of uninitialized value in numeric comparison (<=>) at /mnt/wiki/foswiki/lib/Foswiki/Plugins/TablePlugin/Core.pm line 1353.
• 1 or other value -> it works

---

So it is not a problem of TablePlugin alone, more likely a combination of your setup and the plugin.

-- ArthurClemens - 20 Feb 2009

Hm - I tried some config changes and the $Foswiki::cfg{WarningsAreErrors} = 1; seems to be my table problem - set it to "0" and it runs ... I have set it in my development time (ShibbolethLogon? and out wiki-based CMS). I doesn't think to get trouble with it with stable foswiki parts and yes I forgot the setting. The error is now in the apache error-log:

[Fri Feb 20 18:52:32 2009] [error] [client 134.109.233.1] [Fri Feb 20 18:52:32 2009] view: Use of uninitialized value in numeric comparison (<=>) at /mnt/wiki/foswiki/lib/Foswiki/Plugins/TablePlugin/Core.pm line 1353.

-- GuentherFischer - 20 Feb 2009

--- Core.pm     (revision 2536)
+++ Core.pm     (working copy)
@@ -751,7 +751,7 @@
     my $date          = '';
     my $columnIsValid = 0;
     foreach my $row (@curTable) {
-        next if ( !$row->[$col]->{text} );
+        next unless defined($row->[$col]->{text});
 
         # else
         $columnIsValid = 1;

0 is false in boolean context; hence I believe if ( !$row->[$col]->{text} ); is the wrong test.

-- ChristianLudwig - 20 Feb 2009

Doesn't happen in recent code, so must have been refactored out.

-- ArthurClemens - 05 Mar 2011