Ahhh... Got it working now. Thanks. :) Not sure I know how to activate ZCatalog searching though, or if it is on all the time; the example only mentions ZCatalog once when it deletes it. What determines if a search is a raw object-database search and when it uses the ZCatalog? Always returning the objects is going to a bit slow, though. Couldn't it just return the Pluggable Brains if you search the ZCatalog; or at least have an option to only return them? Bye, -- Bjorn

-----Original Message----- From: Stephan Richter [mailto:srichter@cbu.edu] Sent: Monday, October 08, 2001 23:33 To: Bjorn Stabell Cc: Zope-dev@zope.org Subject: RE: [Zope-dev] ZCatalog searching for missing values

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I just tried out ZOQLMethod as well. Couldn't get it to work, but it looks like really solid craftsmanship. I like the user-friendly way of selecting base object and the complete syntax. :) Some questions:

1. I couldn't get any query to work. I keep getting

exceptions.TypeError argument 2 to map() must be a sequence object

Solved. See below.

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Here's an example query that I've tried

SELECT id WHERE title == '' RECURSIVE;

You can only select meta types (this is by design; I just don't want to deal with brains and all that stuff right now.)!! Did you see the help? It has a long example in there as well. But there is another bug. You have to specify FROM right now. I will fix that. Okay, is fixed for the next release.

So,

SELECT "DTML Method" FROM "." WHERE title == '' RECURSIVE;

should work.

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2. Is the ZCatalog searching implemented? How do I activate it?

Yes, see the "Rather Lengthy Example".

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3. Do you have any plans to implement JOIN?

No, for the reasons given above. You select only objects, not attributes.

BUT, patches are always welcomed!!! :-)

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The exists function would be very cool.

I will look into this. Hopefully it will be not too hard to implement.

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Keep up the great work. Hope this helps flush out some features :)

I hope I will. :-) Yes it does. If you and all the other Zope people could write me some arguments to support attribute selection, then I will look into it (but it will be not that easy).

Regards, Stephan

-- Stephan Richter CBU - Physics and Chemistry Student Web2k - Web Design/Development & Technical Project Management