[Zope-dev] ZCatalog stuff

[Chris Withers]

"R. David Murray" wrote:
> 
> On Thu, 22 Feb 2001, Chris Withers wrote:
> > Apart from that, any ideas how I'd search for a record where the indexed
> > attribute is blank or the secondary sort stuff?
> 
> Somebody contributed a patch for the secondary sort stuff a while back.
> Whether it still works with 2.3.0 is a good question.

Any idea where I'd find that? I may need to give it a go...

> I also remember a *long* time ago (back when I was first starting with
> zope about a year ago) someone posting a method for picking up all
> the records in a catalog with a blank value for a field.  How you'd
> find it in the mail archives, though, I have no clue, nor do I
> remember what the method involved.

Likewise with this. The only solution I can think of at the moment is to have a
seperate 'x_is_blank' index that set to 'not x', but that seems terribly
inefficient to me :-S

Any ideas gratefully recieved :-)

Chris