[Zope-dev] ZCatalog searching for missing values

[Bjorn Stabell]

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,
--=20
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=20
> 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
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> Solved. See below.
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> >Here's an example query that I've tried
> >
> >         SELECT id
> >           WHERE title =3D=3D ''
> >           RECURSIVE;
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> You can only select meta types (this is by design; I just=20
> don't want to=20
> deal with brains and all that stuff right now.)!! Did you see=20
> the help? It=20
> has a long example in there as well.
> But there is another bug. You have to specify FROM right now.=20
> I will fix=20
> that. Okay, is fixed for the next release.
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> So,
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> SELECT "DTML Method"
>    FROM "."
>    WHERE title =3D=3D ''
>    RECURSIVE;
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> should work.
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> >2. Is the ZCatalog searching implemented?  How do I activate it?
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> Yes, see the "Rather Lengthy Example".
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> >3. Do you have any plans to implement JOIN?
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> No, for the reasons given above. You select only objects, not=20
> attributes.
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> BUT, patches are always welcomed!!! :-)
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> >The exists function would be very cool.
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> 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 :)
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> I hope I will. :-) Yes it does. If you and all the other Zope=20
> people could=20
> write me some arguments to support attribute selection, then=20
> I will look=20
> into it (but it will be not that easy).
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> Regards,
> Stephan
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> --
> Stephan Richter
> CBU - Physics and Chemistry Student
> Web2k - Web Design/Development & Technical Project Management
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