$model =~ s/^\s*//;
$model =~ s/\s*$//;
+ $model = undef if (length($model) == 0);
$lens =~ s/^\s*//;
$lens =~ s/\s*$//;
+ $lens = undef if (length($lens) == 0);
# Now update the main table with the information we've got
$dbh->do('UPDATE images SET width=?, height=?, date=?, model=?, lens=? WHERE id=?',