Item9971: Once again, || ruined the day. If you put "" as a search st…

…ring, it evaluates as "", therefore || strikes in, and it is replaced by 0. With this fix, you get ALL topics from a web, not just the ones with the field you want. Stay tuned for next fix

git-svn-id: http://svn.foswiki.org/trunk@9898 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

core/lib/Foswiki/Query/Node.pm

@@ -71,6 +71,10 @@ use constant MONITOR_EVAL => 0;
 sub toString {
     my ($a) = @_;
     return 'undef' unless defined($a);
+    if ( UNIVERSAL::isa( $a, 'Foswiki::Query::Node' ) ) {
+        return '{ op => ' . $a->{op} . ', params => ' . toString( $a->{params}
+        ) . ' }';
+    }
     if ( ref($a) eq 'ARRAY' ) {
         return '[' . join( ',', map { toString($_) } @$a ) . ']';
     }
@@ -206,7 +210,8 @@ sub simplify {
     my $this = shift;
 
     if ( $this->evaluatesToConstant(@_) ) {
-        my $c = $this->evaluate(@_) || 0;
+        my $c = $this->evaluate(@_);
+        $c = 0 unless defined $c;
         if ( $c =~ /^[+-]?(\d+\.\d+|\d+\.|\.\d+|\d+)([eE][+-]?\d+)?$/ ) {
             $this->makeConstant(Foswiki::Infix::Node::NUMBER, $c);
         }