Xapian discuss - Mar 2013 - Sorting by value - direction

Hi,

I'm trying to sort a list of results alphabetically, but it's coming out
in the wrong direction.  Indexing is done like this (PHP bindings):

// Tag name as a value (for sorting)
$doc->add_value(2, strtolower($obj->tag));

And searching like this:

$enquire->set_sort_by_value(2);

But for some reason, the results are coming out Z-A, not A-Z.  I've tried
setting true as the second argument to set_sort_by_value, even though we
shouldn't need to reverse the direction because a standard sort should
produce the right order already.  But even setting the second argument to true,
I still get Z-A.

Using delve I can see the value (slot 2) is set correctly:

# delve -r 25 -V tags
Values for record #25: 1:? 2:finance
Term List for record #25: [snip]

Any ideas?

Andrew

On Tue, Mar 05, 2013 at 10:58:15AM +0000, Andrew Betts
wrote:
> $enquire->set_sort_by_value(2);
Passing one argument to set_sort_by_value() is deprecated (and you'll
get a warning with the C++ headers if your compiler supports that, but
sadly that's not wired up to give a PHP warning).

The original meaning of the second parameter was backwards to what
people expected, so we changed it and deprecated the single argument
form:

http://trac.xapian.org/ticket/311
> But for some reason, the results are coming out Z-A, not A-Z.  I've
> tried setting true as the second argument to set_sort_by_value, even
> though we shouldn't need to reverse the direction because a standard
> sort should produce the right order already.  But even setting the
> second argument to true, I still get Z-A.
Set the second argument to *false* (since you don't want to reverse the
order), and it should do what you want.

Cheers,
    Olly