help re:[ic] TIPS AND TRICKS: Tree example

[interchange-users@interchange.redhat.com (Mike Heins)]

Quoting C.B. Currier (cbcurrier@spinrx.com):
> Some of the code from the example does not seem to work:
> 
> store /cgi-bin/store/tree_build.html Safe: Can't call method "set_slice" on
> an undefined value at (eval 698) line 39.
> 
> 30    my $db = $Db{menu_tree};
> 31    $db->query('delete from menu_tree');
> 32    my @flds = qw/parent_fld child_fld name category/;
> 33    my $count++;
> 34    for(@levels) {
> 35        my $hash = $_;
> 36	for(sort keys %$hash) {
> 37            	my $rec = $hash->{$_};
> 38           	 my $code = shift @$rec;
> 39	$db->set_slice($code, \@flds, $rec);
> 40	    $count++;
> 41        }
> 42    }
> 43    return $count;> 

One wonders if you have a menu_tree database defined? If you don't,
that would cause the error.

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